# Menu 6 − Sequencer and Clock

Mode: RFC‑A

Sequencer

The sequencer, which provides overall control of the drive, is implemented in two stages. The first stage includes the enable logic and sequencer logic and consists of static logic elements. The second stage is a state machine with internal states.

Enable logic

Sequencer logic

The diagram below shows the sequencer logic when Reference Selected Indicator (01.049) is not equal to 4 (i.e. keypad control mode is not selected). The definition of the logic symbols are given in Fig.6.5

The diagram below shows the sequencer logic when Reference Selected Indicator (01.049) =4 (i.e. keypad control mode is selected). The definition of the logic symbols are given in Fig.6.7

Throughout this section reference is made to the sequencer bit parameters Drive Enable (06.015), Run Forward (06.030), Jog Forward (06.031), Run Reverse (06.032), Forward/Reverse (06.033), Run (06.034), Jog Reverse (06.037) and Not Stop (06.039). If Control Word Enable (06.043) = 1 and bit 7 (Auto/manual) in the Control Word (06.042) is 1 then the appropriate bits in the control word are used instead.

Parameter | 06.001 Stop Mode
--- | ---
Short description | Defines how the motor is controlled when the run signal is removed from the drive
Mode | RFC‑A
Minimum | 0 | Maximum | 6
Default | 1 | Units |
Type | 8 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, TE

Value | Text | Description
0 | Coast | Coast stop
1 | rp | Ramp stop
2 | rP.dcI | Ramp stop + 1 second dc injection
3 | dc I | Injection braking stop with detection of zero speed
4 | td.dcI | Timed injection braking stop
5 | diS | Disable
6 | No.rP | No ramp

There is only one phase during the stopping sequence as shown in the table below for each of the possible values of Stop Mode (06.001).

Stop Mode (06.001) | Description
0: Coast | Stop Mode (06.001) = 0 (Coast) the inverter is inhibited immediately when the Final drive run is de-activated. If however, Hold Zero Frequency (06.008) = 1, then the inverter will be re-enabled to hold zero speed. The result is that the inverter is disabled for one sample and then enabled to ramp the motor to a stop. Therefore if coast stop is required Hold Zero Frequency (06.008) should be set to 0.
1: Ramp | If Stop Mode (06.001) = 1 (ramp) the relevant ramp rate is used to stop the motor even if Ramp Enable (02.002) = 0.
2: Ramp followed by d.c. injection | Same as 6.
3: D.c. injection with zero frequency detection | Same as 6.
4: Timed d.c. injection stop | Same as 6.
5: Disable | Inverter disabled
6: No ramp | Stop under current limit

Parameter | 06.002 Limit Switch Stop Mode
--- | ---
Short description | Defines the behaviour of the drive when a limit switch is active
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 1 | Units |
Type | 8 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, TE

Value | Text
0 | Stop
1 | rp

If Limit Switch Stop Mode (06.002) = 0 then when Limit Switch Active (10.066) is activated the motor is stopped without ramps (under current limit control).

If Limit Switch Stop Mode (06.002) = 1 then the motor is stopped with the currently selected ramp rate.

Parameter | 06.003 Supply Loss Mode
--- | ---
Short description | Defines the behaviour of the drive when the supply voltage is reduced
Mode | RFC‑A
Minimum | 0 | Maximum | 3
Default | 0 | Units |
Type | 8 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, TE

Value | Text | Description
0 | diS | Disabled
1 | rP.Stop | Ramp stop
2 | ridE.th | Ride through
3 | Lt.Stop | Limit stop

If Supply Loss Mode (06.003) > 0 and the D.c. Bus Voltage (05.005) falls below Supply Loss Detection Level (06.048) then the supply loss condition is detected. If Supply Loss Mode (06.003) = 2 (ride through) the supply loss system will attempt to control the D.c. Bus Voltage (05.005) to a level just below the Supply Loss Detection Level (06.048) using a d.c. link voltage controller which provides a torque producing current reference to the current controllers to regulate the power flow into the d.c. link. Therefore Current Controller Kp Gain (04.013) and Current Controller Ki Gain (04.014) must be set up correctly for the application. When the supply is reapplied it must be at a level that is high enough for the D.c. Bus Voltage (05.005) to rise above Supply Loss Detection Level (06.048) plus a hysteresis margin. This will disable the supply loss controller and the drive will return to normal operation. The table below gives the d.c. link voltage levels used by the supply loss detection system for different drive voltage ratings.

Voltage level | 200V | 400V | 575V | 690V
Supply loss d.c. link voltage control level | Supply Loss Detection Level (06.048) - 10V | Supply Loss Detection Level (06.048) - 20V | Supply Loss Detection Level (06.048) - 25V | Supply Loss Detection Level (06.048) - 25V
Voltage above which supply loss detection changes from active to inactive | Supply Loss Detection Level (06.048) +10V | Supply Loss Detection Level (06.048) + 15V | Supply Loss Detection Level (06.048) + 50V | Supply Loss Detection Level (06.048) + 50V

0: Disable
No supply loss detection is provided by monitoring the D.c. Bus Voltage (05.005). The drive will continue to operate normally unless the under voltage condition is detected.

1: Ramp Stop
The action taken by the drive is the same as for ride through mode, except that the ramp down rate is at least as fast as the currently selected deceleration ramp and the drive will continue to decelerate and stop even if the supply is re-applied. If Stop Mode (06.001) = 3 or 4 (i.e. d.c. injection) the drive will use ramp mode to stop on loss of the supply. If Stop Mode (06.001) = 2 (i.e. ramp stop followed by injection) the drive will ramp to a stop and then attempt to apply d.c. injection. The ramp down rate is at least as fast as the currently selected deceleration ramp and the drive will continue to decelerate and stop even if the supply is re-applied. Once the sequencer state machine has reached the DISABLE state the drive can restart provided the necessary controls are still active to initiate a start.

2: Ride through
The drive attempts to control the d.c. link voltage to take energy from the motor and load inertia to ride through the Supply loss condition for as long as possible.

Parameter | 06.004 Start/Stop Logic Select
--- | ---
Short description | Used to select the logic function of the drive input terminals
Mode | RFC‑A
Minimum | 0 | Maximum | 6
Default | 0 | Units |
Type | 8 Bit User Save | Update Rate | Actioned on exit of edit mode and on drive reset
Display Format | Standard | Decimal Places | 0
Coding | RW

This parameter changes the functions of the input terminals which are normally associated with the enabling, starting and stopping the drive. This also writes to Enable Sequencer Latching (06.040) to enable and disable the input latches.

Start/Stop Logic Select (06.004) | Digital I/O 2 (M100 - M201) T erminal 11 | Digital I/O 2 (M300- M400) T erminal 11 | Digital Input 3 Terminal 12 | Digital Input 4 Terminal 13 | Enable Sequencer Latching (06.040)
0 (default) | User Enable | Undefined | Run Forward | Run Reverse | 0 (non-latching)
1 | Not Stop | Not Stop | Run Forward | Run Reverse | 1 (latching)
2 | User Enable | Undefined | Run | Reverse | 0 (non-latching)
3 | Not Stop | Not Stop | Run | Reverse | 1 (latching)
4 | Not Stop | Not Stop | Run | Jog Forward | 1 (latching)
5 | User programmable | User programmable | Run Forward | Run Reverse | 0 (non-latching)
6 | User programmable | User programmable | User programmable | User programmable | User programmable

Start/Stop Logic Select (06.004), Enable Sequencer Latching (06.040), Digital IO2 Source/Destination A (08.022), Digital Input 03 Destination A (08.023) and Digital Input 04 Destination A (08.024) are also saved when this parameter is modified. Action will only occur if the drive is inactive. If the drive is active the parameter will return to its pre altered value on exit from edit mode. In mode 6 the user is free to assign the terminals as appropriate to their application.

Parameter | 06.008 Hold Zero Frequency
--- | ---
Short description | Set to 1 to hold the motor at zero frequency
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit User Save | Update Rate | 16ms
Display Format | Standard | Decimal Places | 0
Coding | RW

If Hold Zero Frequency (06.008) = 0 the sequencer state machine goes to the DISABLE state and the inverter is disabled when the Final drive run is de-activated and the motor reaches standstill.

If Hold Zero Frequency (06.008) = 1 and Motor Pre-heat Current Magnitude (06.052) = 0% the sequencer state machine goes to the STOP state when the Final drive run is de-activated and the motor reaches standstill. The drive remains enabled with a frequency reference of zero. If Motor Pre-heat Current Magnitude (06.052) is set to a non-zero value it defines the current in the motor when the sequencer state machine is in the STOP state. This is intended for applications where there is no motor load at standstill, but motor current is required to prevent condensation in the motor when it is stopped. If the motor is not force cooled the motor cooling is less effective at standstill than when the motor is rotating, and so care should be taken not to damage the motor by leaving it at standstill for prolonged periods with a high level of current.

When in HEAT mode i.e. Motor Pre-heat Current Magnitude (06.052) is a non-zero value, the current used is a percentage of the motor rated current.

Parameter | 06.009 Catch A Spinning Motor
--- | ---
Short description | Defines the behaviour of the drive when the drive is enabled whilst the motor is rotating
Mode | RFC‑A
Minimum | 0 | Maximum | 3
Default | 0 | Units |
Type | 8 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, TE

Value | Text
0 | diS
1 | Enable
2 | Fr.Only
3 | Rv.Only

If Catch A Spinning Motor (06.009) = 0 the Post Ramp Reference (02.001) is set to zero when the drive is started. This is suitable for applications where the motor is at standstill or rotating at a low speed when the drive is enabled. However, if Catch A Spinning Motor (06.009) > 0 the sensorless control algorithm will pre-load the Post Ramp Reference (02.001) in a similar way to the Open loop mode test and give a smooth start even if the motor is already spinning.

If Catch A Spinning Motor (06.009) > 0 a test is carried out to measure the frequency of the motor when the sequencer state machine enters the RUN state. The minimum time for the test is approximately 250ms, but this may be extended as time is allowed for the motor flux to build up based on the setting of the motor parameters including Motor Rated Speed (05.008) which should be set to approximately the correct value. The measured frequency is used to preset the Post Ramp Reference (02.001) and give a smooth start even if the motor is already spinning. The test is not carried out if the Final drive run is activated when the sequencer state machine is in the STOP state. For the test to be successful it is important that the motor parameters, especially the Stator Resistance (05.017), are set up correctly. For larger motors it may also be necessary for Spin Start Boost (05.040) to be increased from its default value of 1.0.

Restrictions can be placed on the direction of movement and the possible direction of the detected frequency as given in the table below.

Catch A Spinning Motor (06.009) | Function
0 | Catch a spinning motor disabled
1 | Detect all possible frequencies
2 | Detect positive frequencies only
3 | Detect negative frequencies only

Parameter | 06.010 Enable Conditions
--- | ---
Short description | Displays all the conditions needed to change the state of the final drive enable
Mode | RFC‑A
Minimum | 0 (Display: 000000000000) | Maximum | 4087 (Display: 111111110111)
Default |  | Units |
Type | 16 Bit Volatile | Update Rate | 4ms
Display Format | Binary | Decimal Places | 0
Coding | RO, ND, NC, PT

The Final drive enable is a combination of the Hardware Enable (06.029), Drive Enable (06.015) and other conditions that can prevent the drive from being enabled. All of these conditions are shown as bits in Enable Conditions (06.010) as given in the table below.

Enable Conditions (06.010) bits | Enable condition
0 | Hardware Enable (06.029)
1 | Drive Enable (06.015)
2 | Zero if auto tune completed or trip during auto-tune, but drive needs to be disabled and re-enabled
3 | Reserved
4 | Zero if there is a feedback option module in slot 1 that has an interface that is present and uninitialised
5 | Zero until the drive thermal model has obtained temperatures from all drive thermistors at least once
6 | Zero until all option modules that are present in the drive have indicated that they are ready to run or the system has timed out waiting for this.
7 | Reserved
8-10 | Reserved
11 | Zero if the drive is in standby mode. See Standby Mode Enable (06.060)

Because of the limited number of segments on drives with an LED display, these drives will indicate the parameter value as a decimal value rather than a binary value.

Parameter | 06.011 Sequencer State Machine Inputs
--- | ---
Short description | Displays the states of inputs into the sequencer state machine
Mode | RFC‑A
Minimum | 0 (Display: 0000000) | Maximum | 127 (Display: 1111111)
Default |  | Units |
Type | 8 Bit Volatile | Update Rate | 4ms
Display Format | Binary | Decimal Places | 0
Coding | RO, ND, NC, PT, BU

The bits in Sequencer State Machine Inputs (06.011) show the state of the inputs to the sequencer state machine as given in the tables below:

Sequencer State Machine Inputs (06.011) bits | Signal | Indicates
0 | Final drive enable | The drive inverter is allowed to be enabled.
1 | Final drive run | The motor can move away from standstill.
2 | Under Voltage Active (10.016) | The under voltage condition has been detected.
3 | Zero Frequency (10.003) | Indicated when the motor has stopped.
4 | Drive tripped | The drive is tripped.
5 | Limit Switch Active (10.066) | Limit switch is active
6 | Supply Loss (10.015) | Supply loss condition has been detected.

Because of the limited number of segments on drives with an LED display, these drives will indicate the parameter value as a decimal value rather than a binary value.

Parameter | 06.012 Enable Stop Key
--- | ---
Short description | Set to 1 to enable the use of the stop key
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW

The Stop key can be used to stop the drive if Enable Stop Key (06.012) = 1 or Keypad command is selected (see Reference Selector (01.014)).

If Enable Stop Key (06.012)= 0 and Keypad command is not selected. The Stop key is not active and can be used to initiate a drive reset without stopping the drive from running.

If Enable Stop Key (06.012) = 1 or Keypad command is selected, the drive reset can be initiated without stopping the drive by holding the Run key and then pressing the Stop key.

The Stop key is also used to reset the drive from the keypad.

It should be noted that if the drive is tripped and is then reset from any source other than the keypad Stop key then the drive may start immediately under the following conditions:

1. Enable Sequencer Latching (06.040) = 0, the Final drive enable is active and one of the sequencer bits (Run Forward (06.030), Run Reverse (06.032) or Run (06.034) is active.
2. Enable Sequencer Latching (06.040) = 1, the Final drive enable is active, Not Stop (06.039) is active and one of the sequencer bits (Run Forward (06.030), Run Reverse (06.032) or Run (06.034) is active.

The drive sequencer has been designed so that pressing the Stop key, whatever the value of Enable Stop Key (06.012) or the Command Selection, does not make the drive state change from stopped to running. As pressing the Stop key could reset a drive trip which could then restart the drive, the run output from the sequencer is held off until the following conditions are met when the drive is tripped and the Stop key is pressed.

1. Run Forward (06.030) = 0 and Run Reverse (06.032) = 0 and Run (06.034) = 0*
2. OR Run Forward (06.030) = 1 and Run Reverse (06.032) = 1 for at least 60ms*
3. OR The Final drive enable = 0
4. OR The sequencer is in the UNDER_VOLTAGE state
5. OR If Enable Sequencer Latching (06.040) = 1, Not Stop (06.039) = 0

* If Enable Sequencer Latching (06.040) = 1 then the state of these sequencer bits must be 0 at the output of their latches.

Once the necessary conditions have been met the drive can then be restarted by activating the necessary bits for a normal start.

Parameter | 06.013 Enable Auxiliary Key
--- | ---
Short description | Defines the behaviour of the drive when the auxiliary button is pressed
Mode | RFC‑A
Minimum | 0 | Maximum | 2
Default | 0 | Units |
Type | 8 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, TE

Value | Text
0 | diS
1 | Fd.Rv
2 | Rev

Unidrive KI remote keypad only.

If Reference Selected Indicator (01.049) = 4 then Enable Auxiliary Key (06.013) can be used to enable the Auxiliary key as a reverse key. If Enable Auxiliary Key (06.013) = 1 then each time the Auxiliary key is pressed Reverse Select (01.012) is toggled. If Enable Auxiliary Key (06.013) = 2 then the Auxiliary key behaves in a similar way to the Run key except that the drive runs in the reverse direction when it is pressed.

Parameter | 06.014 Disable Auto Reset On Enable
--- | ---
Short description | Set to 1 to disable auto reset on enable
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit User Save | Update Rate | 4ms
Display Format | Standard | Decimal Places | 0
Coding | RW

Trips are automatically reset on the application of an enable signal. This feature can be disabled using this parameter if Disable Auto Reset On Enable (06.014) = 1.

Parameter | 06.015 Drive Enable
--- | ---
Short description | Set to 1 to enable the drive
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 1 | Units |
Type | 1 Bit User Save | Update Rate | 4ms
Display Format | Standard | Decimal Places | 0
Coding | RW, BU

Drive Enable (06.015) must be active for the drive to be enabled. See Menu 06.

Parameter | 06.016 Date
--- | ---
Short description | Displays the current date
Mode | RFC‑A
Minimum | 0 (Display: 00-00-00) | Maximum | 311299 (Display: 31-12-99)
Default |  | Units |
Type | 32 Bit Volatile | Update Rate | Background read/write
Display Format | Date | Decimal Places | 0
Coding | RW, ND, NC, PT

Date (06.016), Time (06.017) and Day Of Week (06.018) show the date and time as selected by Date/Time Selector (06.019). Date (06.016) stores the date in dd.mm.yy format regardless of the setting made in Date Format (06.020) however if the parameter is viewed using a keypad the date will be displayed in the format selected in Date Format (06.020). If a real time clock is selected from an option module then the days, months and years are from the real time clock and the day of the week is displayed in Day Of Week (06.018). Otherwise the days have a minimum value of 0 and roll over after 30, the months have a minimum value of 0 and roll over after 11, and Day Of Week (06.018) is always 0 (Sunday).

If when setting the date/time this parameter is being written via comms then the value should be written in standard dd/mm/yy format as described below.

The value of this parameter as seen over comms is as follows.

Value = (day[1..31] x 10000) + (month[1..11] x 100) + year[0..99]

Parameter | 06.017 Time
--- | ---
Short description | Displays the current time
Mode | RFC‑A
Minimum | 0 (Display: 00:00:00) | Maximum | 235959 (Display: 23:59:59)
Default |  | Units |
Type | 32 Bit Volatile | Update Rate | Background read/write
Display Format | Time | Decimal Places | 0
Coding | RW, ND, NC, PT

See Date (06.016).

The value of this parameter as seen over comms is as follows.

Value = (hour[0..23] x 10000) + (minute[0..59] x 100) + seconds[0..59]

Parameter | 06.018 Day Of Week
--- | ---
Short description | Displays the current day of the week
Mode | RFC‑A
Minimum | 0 | Maximum | 6
Default |  | Units |
Type | 8 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, TE, ND, NC, PT

Value | Text
0 | Sun
1 | Non
2 | Tue
3 | Ued
4 | Thu
5 | Fri
6 | Sat

See Date (06.016).

Parameter | 06.019 Date/Time Selector
--- | ---
Short description | Defines which clock is used to display the current time, date and day of the week
Mode | RFC‑A
Minimum | 0 | Maximum | 6
Default | 1 | Units |
Type | 8 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, TE

Value | Text
0 | Set
1 | Po.up
2 | Run
3 | Acc.Po
5 | Re.Pad
6 | Slot.1

Date/Time Selector (06.019) is used to select the drive date and time as shown in the table below.

Date/Time Selector (06.019) | Date/Time source
0: Set | Date and time parameters can be written by the user
1: Power | Time since the drive was powered up
2: Running | Accumulated drive running time since the drive was manufactured
3: Acc Power | Accumulated powered-up time since the drive was manufactured
4: Local Keypad | Reserved
5: Remote Keypad | If a keypad connected to the user comms port of a drive with a 485 port includes a real-time clock then the date/time from this clock is displayed, otherwise the date/time is set to zero
6: Slot 1 | If an option module fitted to the drive contains a real-time clock then the date/time from this clock is displayed, otherwise the date/time is set to zero.

When Date/Time Selector (06.019) = 0 the Date (06.016) and Time (06.017) can be written by the user and the values in these parameters are transferred to the real time clocks in the keypad or any option modules that support this feature that are fitted to the drive. When Date/Time Selector (06.019) is changed to any other value, the real time clocks are allowed to run normally again. When Date/Time Selector (06.019) is changed from any value to 0 the date and time from a real time clock, if present, is automatically loaded into Date (06.016) and Time (06.017), so that this date and time is used as the initial value for editing. If more than one real time clock is present the date/time from the remote keypad is used, if present, and if not then the date/time from the option module slot.

Date (06.016) and Time (06.017) are used by the timers in Menu 09 and for time stamping trips. These features will continue to use the originally selected clock even if Date/Time Selector (06.019) is changed until a drive reset is initiated. If Date/Time Selector (06.019) has been changed and a reset is initiated Timer 1 Repeat Function (09.039) and Timer 2 Repeat Function (09.049) are set to zero to disable the timers, and the trip dates and times (10.041 to 10.060) are reset to zero.

Parameter | 06.020 Date Format
--- | ---
Short description | Defines if the US date format is used or not
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 8 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, TE

Value | Text | Description
0 | Std | Standard date format dd.mm.yy
1 | US | US date format mm.dd.yy

Date Format (06.020) selects the display style for Date (06.016), Timer 1 Start Date (09.035), Timer 1 Stop Date (09.037), Timer 2 Start Date (09.045), Timer 2 Stop Date (09.047) and for the trip time stamping date parameters ( Trip 0 Date (10.041), Trip 1 Date (10.043), Trip 2 Date (10.045), Trip 3 Date (10.047), Trip 4 Date (10.049), Trip 5 Date (10.051), Trip 6 Date (10.053), Trip 7 Date (10.055), Trip 8 Date (10.057), Trip 9 Date (10.059)) when displayed on a keypad connected to the drive. The format selection made in this parameter does not affect the value of these parameters if they are read using comms or by a user program.

If Date Format (06.020) is 0 then standard format is used and the date is displayed on the keypad as dd.mm.yy and if Date Format (06.020) is 1 then US format is used and the date is displayed on the keypad as mm.dd.yy.

Parameter | 06.021 Time Between Filter Changes
--- | ---
Short description | Defines the time between filter changes
Mode | RFC‑A
Minimum | 0 | Maximum | 30000
Default | 0 | Units | Hours
Type | 16 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW

Time Between Filter Changes (06.021) should be set to a non-zero value to enable the filter change timer system. Each time Filter Change Required / Change Done (06.022) is changed by the user from 1 to 0 the value of Time Between Filter Changes (06.021) is copied to Time Before Filter Change Due (06.023). For each hour while Drive Active (10.002) = 1 the Time Before Filter Change Due (06.023) is reduced by 1 until it reaches zero. When Time Before Filter Change Due (06.023) changes from 1 to 0 Filter Change Required / Change Done (06.022) is set to 1 to indicate that a filter change is required. The filter should be changed and the system reset again by resetting Filter Change Required / Change Done (06.022) to 0.

Parameter | 06.022 Filter Change Required / Change Done
--- | ---
Short description | Set to 0 when a filter change has taken place
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default |  | Units |
Type | 1 Bit Volatile | Update Rate | Background read/write
Display Format | Standard | Decimal Places | 0
Coding | RW, ND, NC

See Time Between Filter Changes (06.021).

Parameter | 06.023 Time Before Filter Change Due
--- | ---
Short description | Displays the time before a filter change is required
Mode | RFC‑A
Minimum | 0 | Maximum | 30000
Default |  | Units | Hours
Type | 16 Bit Power Down Save | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

See Time Between Filter Changes (06.021).

Parameter | 06.024 Reset Energy Meter
--- | ---
Short description | Set to 1 to reset the energy meter
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit Volatile | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW

Energy Meter: MWh (06.025) and Energy Meter: kWh (06.026) accumulate the energy transferred through the drive. A positive energy value indicates net transfer of energy from the drive to the motor. If Reset Energy Meter (06.024) = 1 then Energy Meter: MWh (06.025) and Energy Meter: kWh (06.026) are held at zero. If Reset Energy Meter (06.024) = 0 then the energy meter is enabled and will accumulate the energy flow. If the maximum or minimum of Energy Meter: MWh (06.025) is reached the parameter does not rollover and is instead clamped at the maximum or minimum value.

Parameter | 06.025 Energy Meter: MWh
--- | ---
Short description | Displays the energy accumulated by through the drive in MWh
Mode | RFC‑A
Minimum | -999.9 | Maximum | 999.9
Default |  | Units | MWh
Type | 16 Bit Power Down Save | Update Rate | Background write
Display Format | Standard | Decimal Places | 1
Coding | RO, ND, NC, PT

See Reset Energy Meter (06.024).

Parameter | 06.026 Energy Meter: kWh
--- | ---
Short description | Displays the energy accumulated by through the drive in kWh
Mode | RFC‑A
Minimum | -99.99 | Maximum | 99.99
Default |  | Units | kWh
Type | 16 Bit Power Down Save | Update Rate | Background write
Display Format | Standard | Decimal Places | 2
Coding | RO, ND, NC, PT

See Reset Energy Meter (06.024).

Parameter | 06.027 Energy Cost Per kWh
--- | ---
Short description | Defines the cost of energy per kWh
Mode | RFC‑A
Minimum | 0.0 | Maximum | 600.0
Default | 0.0 | Units |
Type | 16 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 1
Coding | RW

Running Cost (06.028) is derived from the Output Power (05.003) and the Energy Cost Per kWh (06.027) in cost per hour. The sign of Running Cost (06.028) is the same as the sign of Output Power (05.003).

Parameter | 06.028 Running Cost
--- | ---
Short description | Displays the running cost of the drive
Mode | RFC‑A
Minimum | -32000 | Maximum | 32000
Default |  | Units |
Type | 16 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

See Energy Cost Per kWh (06.027).

Parameter | 06.029 Hardware Enable
--- | ---
Short description | Set to 1 to enable the hardware of the drive
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default |  | Units |
Type | 1 Bit Volatile | Update Rate | 4ms
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT, BU

Hardware Enable (06.029) shows the hardware enable state. Drive I/O is routed to User Enable (06.038). See description of the enable logic for more details.

Parameter | 06.030 Run Forward
--- | ---
Short description | Set to 1 to give the drive a run forward signal
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit Volatile | Update Rate | 4ms
Display Format | Standard | Decimal Places | 0
Coding | RW, NC

If the command source is not the keypad or the control word ( Control Word (06.042) ), then Run Forward (06.030) can be used to make the Final drive run active and Reverse Select (01.012) = 0, i.e. to make the drive run in the forward direction. See description of sequencer logic for more details.

Parameter | 06.031 Jog Forward
--- | ---
Short description | Set to 1 to give the drive a jog forward signal
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit Volatile | Update Rate | 4ms
Display Format | Standard | Decimal Places | 0
Coding | RW, NC

If the command source is not the keypad or the control word ( Control Word (06.042) ), then Jog Forward (06.031) can be used to make the Final drive run active and Jog Select (01.013) = 1, i.e. to make the drive run using the jog reference and jog ramps rates. The jog function is disabled if the run is made active through the normal running sequencing bits. See description of sequencer logic for more details.

Parameter | 06.032 Run Reverse
--- | ---
Short description | Set to 1 to give the drive a run reverse signal
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit Volatile | Update Rate | 4ms
Display Format | Standard | Decimal Places | 0
Coding | RW, NC

If the command source is not the keypad or the control word ( Control Word (06.042) ), then Run Reverse (06.032) can be used to make the Final drive run active and Reverse Select (01.012) = 1, i.e. to make the drive run in the reverse direction. See description of sequencer logic for more details.

Parameter | 06.033 Forward/Reverse
--- | ---
Short description | Set to 1 to reverse the direction of the motor
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit Volatile | Update Rate | 4ms
Display Format | Standard | Decimal Places | 0
Coding | RW, NC

If the command source is not the keypad or the control word ( Control Word (06.042) ), then Forward/Reverse (06.033) can be used to force the state of Reverse Select (01.012). If Forward/Reverse (06.033) = 1 then Reverse Select (01.012) = 1. If Forward/Reverse (06.033) = 0 then Reverse Select (01.012) = 0 unless it is set to 1 by the rest of the normal run or jog logic. See description of sequencer logic for more details.

Parameter | 06.034 Run
--- | ---
Short description | Set to 1 to give the drive a run signal
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit Volatile | Update Rate | 4ms
Display Format | Standard | Decimal Places | 0
Coding | RW, NC

If the command source is not the keypad or the control word ( Control Word (06.042) ), then Run (06.034) can be used to make the Final drive run active, but not to affect the state of Reverse Select (01.012). Normally Run (06.034) would be used in conjunction with Forward/Reverse (06.033) if control of the direction is required. See description of sequencer logic for more details.

Parameter | 06.035 Forward Limit Switch
--- | ---
Short description | Set to 1 to activate the forward limit switch active signal and remove the Final drive run signal
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit Volatile | Update Rate | 1ms read
Display Format | Standard | Decimal Places | 0
Coding | RW, NC

Forward Limit Switch (06.035) and Reverse Limit Switch (06.036) can be used to activate the Limit switch active signal and remove the Final drive run signal. See description of sequencer logic for more details.

Condition | Forward Limit Switch (06.035) | Reverse Limit Switch (06.036)
Pre-ramp Reference (01.003) + * Hard Frequency Reference (03.022) > 0.00 | Active | Not active
Pre-ramp Reference (01.003) + *Hard Frequency Reference (03.022) < 0.00 | Not active | Active
Pre-ramp Reference (01.003) + *Hard Frequency Reference (03.022) = 0.00 | Active | Active

* If Hard Frequency Reference Select (03.023) = 0 then the Hard Frequency Reference (03.022) is taken as 0

Forward Limit Switch (06.035) and Reverse Limit Switch (06.036) operate in a similar way to Open loop mode when Limit switch active becomes active. If Limit Switch Stop Mode (06.002) = 0 the motor is stopped without ramps (in current limit), otherwise it is stopped with the currently selected ramp rate. If a digital input that is integral to the drive is used the maximum delay is 2.5ms. The limit switches are direction dependant, so that the motor can rotate in a direction that allows the system to move away from the limit switch.

Parameter | 06.036 Reverse Limit Switch
--- | ---
Short description | Set to 1 to activate the reverse limit switch active signal and remove the Final drive run signal
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit Volatile | Update Rate | 1ms read
Display Format | Standard | Decimal Places | 0
Coding | RW, NC

See Forward Limit Switch (06.035).

Parameter | 06.037 Jog Reverse
--- | ---
Short description | Set to 1 to give the drive a jog reverse signal
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit Volatile | Update Rate | 4ms
Display Format | Standard | Decimal Places | 0
Coding | RW, NC

If the command source is not the keypad or the control word ( Control Word (06.042) ), then Jog Reverse (06.037) can be used to make the Final drive run active, Jog Select (01.013) = 1 and Reverse Select (01.012) = 1, i.e. to make the drive run using the jog reference and jog ramps rates in the reverse direction. The jog function is disabled if the run is made active through the normal running sequencing bits. See description of sequencer logic for more details.

Parameter | 06.038 User Enable
--- | ---
Short description | Used to Enable/Disable the drive frorm a terminal
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 1 | Units |
Type | 1 Bit Volatile | Update Rate | 4ms
Display Format | Standard | Decimal Places | 0
Coding | RW, NC

This parametercontrols Hardware Enable (06.029). A user must set this parameter as a destination from a digital input. The logic value of this parameter will be set to 1 if it has not been used as a destination.

Parameter | 06.039 Not Stop
--- | ---
Short description | Set to 1 to reset the latched sequencer bits if sequencer latching is enabled
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit Volatile | Update Rate | 4ms
Display Format | Standard | Decimal Places | 0
Coding | RW, NC

If Enable Sequencer Latching (06.040) = 1 then the sequencer bits can be latched. Not Stop (06.039) should be used to reset the latched sequencer bits. If Not Stop (06.039) = 1 then the sequencer bits can be latched. If Not Stop (06.039) = 0 then the latches are cleared and their outputs are forced to zero which will de-activate the Final drive run. See description of sequencer logic for more details.

Parameter | 06.040 Enable Sequencer Latching
--- | ---
Short description | Set to 1 to enable sequencer latching
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit User Save | Update Rate | 4ms
Display Format | Standard | Decimal Places | 0
Coding | RW

See Not Stop (06.039).

Parameter | 06.041 Drive Event Flags
--- | ---
Short description | Displays certain actions that have occurred within the drive
Mode | RFC‑A
Minimum | 0 (Display: 00) | Maximum | 3 (Display: 11)
Default | 0 (Display: 00) | Units |
Type | 8 Bit Volatile | Update Rate | Background write
Display Format | Binary | Decimal Places | 0
Coding | RW, NC

Drive Event Flags (06.041) indicates that certain actions have occurred within the drive as described below.

Bit | Corresponding event
0 | Defaults loaded
1 | Drive mode changed

Because of the limited number of segments on drives with an LED display, these drives will indicate the parameter value as a decimal value rather than a binary value.

Bit 0: Defaults loaded
The drive sets bit 0 when defaults have been loaded and the associated parameter save has been completed. The drive does not reset this flag except at power-up.

Bit 1: Drive mode changed
The drive sets bit 1 when the drive mode has changed and the associated parameter save has been completed. The drive does not reset this flag except at power-up.

Parameter | 06.042 Control Word
--- | ---
Short description | Controls the sequencer state machine inputs if the control word is enabled
Mode | RFC‑A
Minimum | 0 (Display: 000000000000000) | Maximum | 32767 (Display: 111111111111111)
Default | 0 (Display: 000000000000000) | Units |
Type | 16 Bit Volatile | Update Rate | Bits 9,7-0: 4ms, Other bits: Background read
Display Format | Binary | Decimal Places | 0
Coding | RW, NC

If Control Word Enable (06.043) = 0 then Control Word (06.042) has no effect. If Control Word Enable (06.043) = 1 the bits in Control Word (06.042) are used instead of their corresponding parameters or to initiate drive functions as shown in the table below:

Bit | Corresponding paramter or function
0 | Drive Enable (06.015)
1 | Run Forward (06.030)
2 | Jog Forward (06.031)
3 | Run Reverse (06.032)
4 | Forward/Reverse (06.033)
5 | Run (06.034)
6 | Not Stop (06.039)
7 | Auto / manual
8 | Analog / Preset reference
9 | Jog Reverse (06.037)
10 | Not used
11 | Not used
12 | Trip drive
13 | Reset drive
14 | Watchdog

Because of the limited number of segments on drives with an LED display, these drives will indicate the parameter value as a decimal value rather than a binary value.

Bits 0-7 and bit 9: Sequencer control
When Auto/manual bit (bit7) = 1 then bits 0 to 6 and bit 9 of the Control Word (06.042) become active. The equivalent parameters are not modified by these bits, but become inactive when the equivalent bits in the Control Word (06.042) are active. When the bits are active they replace the functions of the equivalent parameters.

Bit 8: Analogue/preset reference
The state of Analogue/Preset Reference (bit 8) is written continuously to Reference Select Flag 2 (01.042). With default drive settings (i.e. Reference Selector (01.014) = 0) this selects Analog Reference 1 (01.036) when bit 8 = 0 or Preset Reference 1 (01.021) when bit8 = 1. If any other drive parameters are routed to Reference Select Flag 2 (01.042) the value of this parameter is undefined.

Bit 10 and bit 11: Not used
The values of these bits have no effect on the drive.

Bit 12: Trip drive
If bit 12 = 1 then a Control Word trip is repeatedly initiated. The trip cannot be cleared until bit 12 = 0.

Bit 13: Reset drive
If bit 13 is changed from 0 to 1 a drive reset is initiated. Bit 13 does not modify Drive Reset (10.033).

Bit 14: Watchdog
A watchdog system can be enabled or serviced each time bit 14 is changed from 0 to 1. Once bit 14 has been changed from 0 to 1 to enable the watchdog, this must be repeated every 1s or else a Watchdog trip will be initiated. The watchdog is disabled when the trip occurs and must be re-enabled if required when the trip is reset.

Parameter | 06.043 Control Word Enable
--- | ---
Short description | Set to 1 to enable the control word
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 8 Bit User Save | Update Rate | 4ms
Display Format | Standard | Decimal Places | 0
Coding | RW

See Control Word (06.042).

Parameter | 06.045 Cooling Fan control
--- | ---
Short description | Defines the maximum speed of the drive cooling fan
Mode | RFC‑A
Minimum | 0 | Maximum | 5
Default | 2 | Units |
Type | 8 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW

Note: Size 1 drives only have a single fan speed and so some of the operational modes are not available.

If Cooling Fan control (06.045) = 0 the cooling fan in the drive is off.

Some option modules consume more power than others and so if one of the higher power consumption modules is fitted to the drive, the drive will trip OHt Control if Stack Temperature (07.004) is above an internally set threshold (drive power rating dependant), and the option module will be forced to go into standby.

If Cooling Fan control (06.045) = 1 the cooling fan in the drive is forced to run at full speed.

If Cooling Fan control (06.045) = 2 the cooling fan in the drive is controlled by the values of Stack Temperature (07.004) and Current Magnitude (04.001) . The fan will run at full speed for at least 20 seconds if Stack Temperature (07.004) is greater than a frame dependent threshold (60 °C for size 1 & 2 or 50 °C for size 3 & 4) or Current Magnitude (04.001) is greater than 75% of Drive current rating (11.068), otherwise the cooling fan is off. If neither of the above conditions are causing the fan to run, the fan will run at low speed if one of the higher power consumption option modules is fitted and Stack Temperature (07.004) is above the internally set threshold. The fan will not turn off until Stack Temperature (07.004) falls to 5°C below the internally set threshold.

If Cooling Fan control (06.045) = 3 is the same as Cooling Fan control (06.045) = 2 but the cooling fan never turns off but runs at low speed when full speed is not being called for. This mode is not available on size 1 and so if selected, mode 2 is used instead.

If Cooling Fan control (06.045) = 4 the cooling fan in the drive is at low speed continuously. This mode is not available on size 1 and so if selected, mode 1 is used instead.

If Cooling Fan control (06.045) = 5 is the same as Cooling Fan control (06.045) = 2 but with an additional lower temperature threshold that causes the fan to run at low speed if Stack Temperature (07.004) is above the lower threshold - “theatre mode”. In some applications this may prevent the fan running at full speed and so keep the audible noise down to a minimum. This mode is not available on size 1 and so if selected, mode 2 is used instead.

Parameter | 06.047 Input Phase Loss Detection Mode
--- | ---
Short description | Defines how the input phase loss is detected
Mode | RFC‑A
Minimum | 0 | Maximum | 2
Default | 0 | Units |
Type | 8 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, TE

Value | Text
0 | Full
1 | RIPPLE
2 | diS

Input phase loss is detected by monitoring the d.c. link voltage ripple which increases with load. When compared to normal operation, if an input phase is missing or there is excessive input phase imbalance the d.c. link ripple level is higher. The high ripple level is detected to initiate a PH.Lo trip. For drive sizes 8 and above an additional input phase loss detection is provided by direct monitoring of the supply voltages (PH.Lo trip). Unlike the d.c. voltage ripple based detection which can only operate when the drive is enabled and on load, the additional input phase loss detection can operate whether the drive is enabled or not. Input Phase Loss Detection Mode (06.047) defines the methods used for input phase loss detection provided by the drive.

Input Phase Loss Detection Mode (06.047) | Drive Active (10.002) = 0 | Drive Active (10.002) = 1
0 | *Direct input phase loss detection | *Direct input phase loss detection D.c. link voltage ripple detection
1 | *Direct input phase loss detection | D.c. link voltage ripple detection
2 | No input phase loss detection | No input phase loss detection

*Frame sizes 8 and above

Input phase loss detection can be disabled when the drive is required to operate from a d.c. supply connected to the d.c. link or from a single phase supply. If the drive operates from a single phase supply or a supply with high levels of phase imbalanced under load the input stage and d.c. link thermal protection system may produce a OHt dc bus trip.

Parameter | 06.048 Supply Loss Detection Level
--- | ---
Short description | Defines the threshold for indicating when the supply loss condition is detected
Mode | RFC‑A
Minimum | 0 | Maximum | VM_SUPPLY_LOSS_LEVEL
Default | See exceptions below | Units | V
Type | 16 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, VM, RA

Voltage | Default Value
110V | 205
200V | 205
400V | 410
575V | 540
690V | 540

Defines the threshold for indicating when the supply loss condition is detected.

The threshold can be adjusted to higher levels using this parameter. If the value is reduced below the default value the default value is used by the drive. If the level is set too high so that supply loss detection becomes active under normal operating conditions, the motor will coast to a stop.

Parameter | 06.051 Hold Supply Loss Active
--- | ---
Short description | Hold Supply Loss Active
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit Volatile | Update Rate | 1ms read
Display Format | Standard | Decimal Places | 0
Coding | RW, NC

If supply loss is detected (i.e. Supply Loss (10.015) = 1) or Hold Supply Loss Active (06.051) = 1 the supply loss indication and the action taken on supply loss will be active. For example, Hold Supply Loss Active (06.051) can be controlled by an external rectifier or a Regen system (via a digital input) to prevent power from being taken from the supply if supply loss ride-through mode is being used until the input system is ready to provide power. This can allow for the charge system in an external rectifier to complete the charging, or it can allow a Regen system to become synchronised.

Parameter | 06.052 Motor Pre-heat Current Magnitude
--- | ---
Short description | Defines the current in the motor when the state machine is in the stop state
Mode | RFC‑A
Minimum | 0 | Maximum | 100
Default | 0 | Units | %
Type | 8 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW

See Hold Zero Frequency (06.008).

Parameter | 06.058 Output Phase Loss Detection Time
--- | ---
Short description | Output Phase Loss Detection Time
Mode | RFC‑A
Minimum | 0 | Maximum | 3
Default | 0 | Units |
Type | 8 Bit User Save | Update Rate | Background Read
Display Format | Standard | Decimal Places | 0
Coding | RW, TE

Value | Text
0 | 0.5
1 | 1.0
2 | 2.0
3 | 4.0

See Output Phase Loss Detection Enable (06.059).

Parameter | 06.059 Output Phase Loss Detection Enable
--- | ---
Short description | Set to 1 to enable output phase loss detection
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW

Output phase loss detection can be used to detect a disconnected motor phase if Output Phase Loss Detection Enable (06.059) is set to a non-zero value.

0: Disabled
Output phase loss detection is not active.

1: Enabled
A test is carried out each time the drive is enabled to run to check if all three phases are connected. If the test fails an Out Phase Loss.X trip is initiated where X indicates which phase is not connected (1 = U, 2 = V, 3 = W). It should be noted that this test is not carried out in Open-loop mode if "catch a spinning motor is enabled (i.e. Catch A Spinning Motor (06.009) > 0).

A test is also carried out while the drive is running. If the drive output frequency is above 4Hz and a phase is disconnected for the time specified by Output Phase Loss Detection Time (06.058) then a Out Phase Loss.4 trip is initiated. It should be noted that if the motor is operating at high speed and flux weakening is active so that the magnetising current is below half the rated level then output phase loss will not be detected. If the motor is heavily loaded when a phase is disconnected it is likely that the motor will stall and the drive output frequency may fall below 4Hz before output phase loss is detected.

Parameter | 06.060 Standby Mode Enable
--- | ---
Short description | Set to 1 enable standby mode
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW

If Standby Mode Enable (06.060) = 1 then the drive will go into the standby power state 20 seconds after the last key press and whenever Drive Active (10.002) = 0. In this state the LED on the front of the drive flashes 0.25s on and 2s off. And the following actions are taken as defined by the Standby Mode Mask (06.061). Actions are enabled by setting the appropriate bit to 1.

Standby Mode Mask (06.061) bits | Action
0 | NA
1 | Instruct all keypads to go into their standby state
2 | NA
3 | Instruct the option module in option slot 1 to go into the standby power state

Because of the limited number of segments on drives with an LED display, these drives will indicate the parameter value as a decimal value rather than a binary value.

Parameter | 06.061 Standby Mode Mask
--- | ---
Short description | Defines the behaviour of standby mode
Mode | RFC‑A
Minimum | 0 (Display: 0000) | Maximum | 15 (Display: 1111)
Default | 0 (Display: 0000) | Units |
Type | 8 Bit User Save | Update Rate | Background read
Display Format | Binary | Decimal Places | 0
Coding | RW

See Standby Mode Enable (06.060).

Parameter | 06.071 Slow Rectifier Charge Rate Enable
--- | ---
Short description | Set to 1 to reduce the charge rate of the d.c. bus
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW

For Frame size 07 and larger, which use a d.c. link charge system based on a half controlled thyristor input bridge, the rate at which the d.c. link is charged can be reduced by setting Slow Rectifier Charge Rate Enable (06.071) to one. This will reduce the charging current which may be required if significant additional capacitance is added to the d.c. link to prevent rupturing of input fuses.

Parameter | 06.073 Braking IGBT Lower Threshold
--- | ---
Short description | Defines the lowest level of the d.c. bus voltage where the braking IGBT becomes active
Mode | RFC‑A
Minimum | −VM_DC_VOLTAGE_SET | Maximum | VM_DC_VOLTAGE_SET
Default | See exceptions below | Units | V
Type | 16 Bit User Save | Update Rate | Background
Display Format | Standard | Decimal Places | 0
Coding | RW, VM, RA

Voltage | Default Value
110V | 390
200V | 390
400V | 780
575V | 930
690V | 1120

Braking IGBT Lower Threshold (06.073) defines the lowest level of D.c. Bus Voltage (05.005) where the braking IGBT will become active and Braking IGBT Upper Threshold (06.074) defines the level of D.c. Bus Voltage (05.005) where the braking IGBT will be on continuously. When the braking IGBT is turned on it will remain on for at least 1ms. The braking IGBT on-time is defined by the thresholds and the d.c. link voltage as given in the table below where L = Braking IGBT Lower Threshold (06.073) and U = Braking IGBT Upper Threshold (06.074).

D.c. link voltage level | On-time
D.c. Bus Voltage (05.005) < L | 0%
L ≤ D.c. Bus Voltage (05.005) ≤ U | [(D.c. Bus Voltage (05.005) - L) / (U - L)] x 100%
D.c. Bus Voltage (05.005) ≥ U | 100%

As the D.c. Bus Voltage (05.005) rises above the lower threshold the braking IGBT is active with an on/off ratio of 1/100. As the voltage rises further, the on/off ratio increases until at the upper threshold the braking IGBT is on continuously. The upper and lower voltage threshold can be set up so that braking resistors in drives with parallel connected d.c. links will share the braking load.

If Braking IGBT Lower Threshold (06.073) ≥ Braking IGBT Upper Threshold (06.074) then the braking IGBT is off when D.c. Bus Voltage (05.005) Braking IGBT Upper Threshold (06.074) and on if D.c. Bus Voltage (05.005) ≥ Braking IGBT Upper Threshold (06.074). This method of control is the same as that used in Commander SK and the default values for the braking thresholds are equal to the braking thresholds in Commander SK.

Unless sharing between braking resistors is required the braking thresholds do not normally need to be adjusted. Care should be taken when reducing the thresholds because if either threshold is below the maximum value of the peak rectified supply voltage the braking resistor could take power from the supply.

The list below gives conditions that will disable the braking IGBT:

1. Braking IGBT Upper Threshold (06.074) = 0, or Low Voltage Braking IGBT Threshold Select (06.076) = 1 and Low Voltage Braking IGBT Threshold (06.075) = 0.
2. The drive is in the under-voltage state.
3. A priority 1, 2 or 3 trip is active.
4. There is a fault in the control system power supply.
5. The hardware or software over-temperature systems indicate that the braking resistor is too hot.
6. A braking IGBT over-current trip is active OI Brake.

Parameter | 06.074 Braking IGBT Upper Threshold
--- | ---
Short description | Defines the level of the d.c. bus voltage where the braking IGBT will be on continuously
Mode | RFC‑A
Minimum | −VM_DC_VOLTAGE_SET | Maximum | VM_DC_VOLTAGE_SET
Default | See exceptions below | Units | V
Type | 16 Bit User Save | Update Rate | Background
Display Format | Standard | Decimal Places | 0
Coding | RW, VM, RA

Voltage | Default Value
110V | 390
200V | 390
400V | 780
575V | 930
690V | 1120

See Braking IGBT Lower Threshold (06.073).

Parameter | 06.075 Low Voltage Braking IGBT Threshold
--- | ---
Short description | Defines the threshold used for low voltage braking
Mode | RFC‑A
Minimum | −VM_DC_VOLTAGE_SET | Maximum | VM_DC_VOLTAGE_SET
Default | 0 | Units | V
Type | 16 Bit User Save | Update Rate | Background
Display Format | Standard | Decimal Places | 0
Coding | RW, VM, RA

If Low Voltage Braking IGBT Threshold Select (06.076) = 0 the normal thresholds are used. If Low Voltage Braking IGBT Threshold Select (06.076) = 1 then Low Voltage Braking IGBT Threshold (06.075) is used for both upper and lower thresholds. This allows a different braking threshold to be set for low voltage operation.

Parameter | 06.076 Low Voltage Braking IGBT Threshold Select
--- | ---
Short description | Set to 1 enable low voltage IGBT braking
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit Volatile | Update Rate | Background
Display Format | Standard | Decimal Places | 0
Coding | RW

See Low Voltage Braking IGBT Threshold (06.075)

Parameter | 06.077 Low DC Link Operation
--- | ---
Short description | Set to 1 to allow a 400V drive to operate on a 240V supply
Mode | RFC‑A
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW

On the 400V product setting this bit will enable the drive to operate on a 240VAC input. Low DC Link Operation is enabled when Low DC Link Operation (06.077) is set to one. See figure below.

Low AC Alarm (10.107) is displayed from step 2 on the figure above.

The functionality described for Low DC Link Operation (06.077) is supported across Frames 02-09. For Frames 05 and above, the minimum supply voltage supported is 330V DC (233VAC RMS)

Parameter | 06.084 UTC Offset
--- | ---
Short description | UTC Offset
Mode | RFC‑A
Minimum | -24.00 | Maximum | 24.00
Default | 0.00 | Units | Hours
Type | 16 Bit User Save | Update Rate | Background Read
Display Format | Standard | Decimal Places | 2
Coding | RW

UTC Offset (06.084) is an offset, specified in hours, applied to the selected clock source (see Date/Time Selector (06.019)). This could be used for time zone offsets etc. The offset will be applied to the time obtained from the selected clock source, in addition to any offset already applied to the time from that source.