# Variable Minimum / Maximum Pairs

The descriptions below define the variable minimum/maximum pairs that can be used with parameters when the VM format bit is set. The variable minimum and maximum themselves can be dependent on other parameters, or the drive rating or other conditions as defined. The variable minimum and the variable maximum have a limited range and this is defined for each minimum/maximum pair.

Identifier | VM_AC_VOLTAGE
--- | ---
Description | Range applied to parameters showing a.c. voltage
Units | V
Range of [MIN] | 0
Range of [MAX] | 0 to 930

VM_AC_VOLTAGE[MAX] in drive voltage rating dependent. See the table below.

Voltage level | 200V | 400V | 575V | 690V
VM_AC_VOLTAGE[MAX] | 325 | 650 | 780 | 930

VM_AC_VOLTAGE[MIN] = 0

Identifier | VM_AC_VOLTAGE_SET
--- | ---
Description | Range applied to a.c. voltage set-up parameters
Units | V
Range of [MIN] | 0
Range of [MAX] | 0 to 765

VM_AC_VOLTAGE_SET[MAX] is drive voltage rating dependent. See the table below.

Voltage level | 200V | 400V | 575V | 690V
VM_AC_VOLTAGE_SET[MAX] | 265 | 530 | 635 | 765

VM_AC_VOLTAGE_SET[MIN] = 0

Identifier | VM_ACCEL_RATE
--- | ---
Description | Maximum applied to the ramp rate parameters
Units | s/100Hz, s/1000rpm, s/1000mm/s
Range of [MIN] | Open-loop: 0.0 RFC-A, RFC-S: 0.000
Range of [MAX] | Open-loop: 0.0 to 3200.0 RFC-A, RFC-S: 0.000 to 3200.000

A maximum needs to be applied to the ramp rate parameters because the units are a time for a change of speed from zero to a defined level or to maximum speed. The defined level is 100Hz for Open-loop mode and 1000rpm or 1000mm/s for RFC-A and RFC-S modes. If the change of speed is to the maximum speed then changing the maximum speed changes the actual ramp rate for a given ramp rate parameter value. The variable maximum calculation ensures that longest ramp rate (parameter at its maximum value) is not slower than the rate with the defined level, i.e. 3200.00 s / Hz for Open-loop mode, and 3200.000 s / 1000rpm or 3200.000 s / 1000mm/s for RFC-A and RFC-S modes.
The maximum frequency/speed is taken from Maximum Reference Clamp (01.006) if Select Motor 2 Parameters (11.045) = 0, or M2 Maximum Reference Clamp (21.001) if Select Motor 2 Parameters (11.045) = 1.

Open-loop mode
VM_ACCEL_RATE[MIN] = 0.0

If Ramp Rate Units (02.039) = 0:
VM_ACCEL_RATE[MAX] = 3200.0
Otherwise:
VM_ACCEL_RATE[MAX] = 3200.0 x Maximum frequency / 100.0

RFC-A, RFC-S modes
VM_ACCEL_RATE[MIN] = 0.000

If Ramp Rate Units (02.039) = 0:
VM_ACCEL_RATE[MAX] = 3200.000
Otherwise:
VM_ACCEL_RATE[MAX] = 3200.000 x Maximum speed / 1000.0

Identifier | VM_AMC_JERK_UNIPOLAR
--- | ---
Description | Range applied to the parameters showing the AMC jerk
Units | User units / ms / ms / ms
Range of [MIN] | 0
Range of [MAX] | 107374.1823

VM_AMC_JERK_UNIPOLAR[MAX] = 107374.1823 / AMC Auto Resolution Scaling (31.016)

VM_AMC_JERK_UNIPOLAR[MIN] = 0

Identifier | VM_AMC_POSITION
--- | ---
Description | Range applied to the parameters showing the AMC position
Units | User units
Range of [MIN] | -2147483648
Range of [MAX] | 2147483647

VM_AMC_POSITION is modified by AMC Auto Resolution Scaling (31.016) and AMC Roll Over Limit (31.010). See the table below.

AMC Roll Over Limit (31.010) | = 0 | > 0
VM_AMC_POSITION[MAX] | 2147483647 / AMC Auto Resolution Scaling (31.016) | AMC Roll Over Limit (31.010) - 1
VM_AMC_POSITION[MIN] | -2147483648 / AMC Auto Resolution Scaling (31.016) | 0

Identifier | VM_AMC_POSITION_CAM
--- | ---
Description | Range applied to the parameters showing the AMC cam position
Units | User units
Range of [MIN] | -1073741824
Range of [MAX] | 1073741823

VM_AMC_POSITION_CAM is modified by AMC Auto Resolution Scaling (31.016) and AMC Roll Over Limit (31.010). See the table below.

AMC Roll Over Limit (31.010) | = 0 | > 0
VM_AMC_POSITION_CAM[MAX] | 1073741823 / AMC Auto Resolution Scaling (31.016) | AMC Roll Over Limit (31.010) - 1
VM_AMC_POSITION_CAM[MIN] | -1073741824 / AMC Auto Resolution Scaling (31.016) | -AMC Roll Over Limit (31.010) + 1

Identifier | VM_AMC_POSITION_CAM_UNIPOLAR
--- | ---
Description | Unipolar version of VM_AMC_POSITION_CAM
Units | User units
Range of [MIN] | 0
Range of [MAX] | 1073741823

VM_AMC_POSITION_CAM_UNIPOLAR is modified by AMC Auto Resolution Scaling (31.016) and AMC Roll Over Limit (31.010). See the table below.

AMC Roll Over Limit (31.010) | = 0 | > 0
VM_AMC_POSITION_CAM_UNIPOLAR[MAX] | 1073741823 / AMC Auto Resolution Scaling (31.016) | AMC Roll Over Limit (31.010) - 1
VM_AMC_POSITION_CAM_UNIPOLAR[MIN] | 0 | 0

Identifier | VM_AMC_POSITION_REF
--- | ---
Description | Range applied to the AMC position reference
Units | User units
Range of [MIN] | -2147483648
Range of [MAX] | 2147483647

VM_AMC_POSITION_REF is modified by AMC Auto Resolution Scaling (31.016), AMC Roll Over Limit (31.010) and AMC Rotary Mode (34.005). See the table below.

AMC Roll Over Limit (31.010) | = 0 | > 0 | > 0
AMC Rotary Mode (34.005) | Not active | < 4 | = 4
VM_AMC_POSITION_REF[MAX] | 2147483647 / AMC Auto Resolution Scaling (31.016) | AMC Roll Over Limit (31.010) - 1 | 1073741823 / AMC Auto Resolution Scaling (31.016)
VM_AMC_POSITION_REF[MIN] | -2147483648 / AMC Auto Resolution Scaling (31.016) | 0 | -1073741824 / AMC Auto Resolution Scaling (31.016)

Identifier | VM_AMC_POSITION_UNIPOLAR
--- | ---
Description | Unipolar version of VM_AMC_POSITION
Units | User units
Range of [MIN] | 0
Range of [MAX] | 2147483647

VM_AMC_POSITION_UNIPOLAR is modified by AMC Auto Resolution Scaling (31.016) and AMC Roll Over Limit (31.010). See the table below.

AMC Roll Over Limit (31.010) | = 0 | > 0
VM_AMC_POSITION_UNIPOLAR[MAX] | 2147483647 / AMC Auto Resolution Scaling (31.016) | AMC Roll Over Limit (31.010) - 1
VM_AMC_POSITION_UNIPOLAR[MIN] | 0 | 0

Identifier | VM_AMC_RATE
--- | ---
Description | Range applied to the parameters showing the AMC acceleration
Units | User units / ms / ms
Range of [MIN] | 1073742.824
Range of [MAX] | 1073741.823

VM_AMC_RATE_UNIPOLAR[MAX] = 1073741.823 / AMC Auto Resolution Scaling (31.016)

VM_AMC_RATE_UNIPOLAR[MIN] = 1073741.824 / AMC Auto Resolution Scaling (31.016)

Identifier | VM_AMC_RATE_UNIPOLAR
--- | ---
Description | Unipolar version of VM_AMC_RATE
Units | User units / ms / ms
Range of [MIN] | 0
Range of [MAX] | 1073741.823

VM_AMC_RATE_UNIPOLAR[MAX] = 1073741.823 / AMC Auto Resolution Scaling (31.016)

VM_AMC_RATE_UNIPOLAR[MIN] = 0

Identifier | VM_AMC_ROLLOVER
--- | ---
Description | Maximum applied to the AMC Rollover parameter
Units | User units
Range of [MIN] | 0
Range of [MAX] | 1073741823

VM_AMC_ROLLOVER[MAX] = 1073741823 / AMC Auto Resolution Scaling (31.016)

VM_AMC_ROLLOVER[MIN] = 0

Identifier | VM_AMC_SPEED
--- | ---
Description | Range applied to the parameters showing the AMC speed
Units | User units / ms
Range of [MIN] | -21474836.48
Range of [MAX] | 21474836.47

VM_AMC_SPEED[MAX] = 21474836.47 / AMC Auto Resolution Scaling (31.016)

VM_AMC_SPEED[MIN] = -21474836.48 / AMC Auto Resolution Scaling (31.016)

Identifier | VM_AMC_SPEED_UNIPOLAR
--- | ---
Description | Unipolar version of VM_AMC_SPEED
Units | User units / ms
Range of [MIN] | 0
Range of [MAX] | 21474836.47

VM_SPEED_UNIPOLAR[MAX] = 21474836.47 / AMC Auto Resolution Scaling (31.016)

VM_SPEED_UNIPOLAR[MIN] = 0

Identifier | VM_DC_VOLTAGE
--- | ---
Description | Range applied to d.c. voltage reference parameters
Units | V
Range of [MIN] | 0
Range of [MAX] | 0 to 1190

VM_DC_VOLTAGE[MAX] is the full scale d.c. link voltage feedback (over voltage trip level) for the drive. This level is drive voltage rating dependent. See the table below.

Voltage level | 200V | 400V | 575V | 690V
VM_DC_VOLTAGE[MAX] | 415 | 830 | 990 | 1190

VM_DC_VOLTAGE[MIN] = 0

Identifier | VM_DC_VOLTAGE_SET
--- | ---
Description | Range applied to d.c. voltage reference parameters
Units | V
Range of [MIN] | 0
Range of [MAX] | 0.0 to 1150.0

VM_DC_VOLTAGE_SET[MAX] is drive voltage rating dependent. All values are shown in the table below.

Voltage level | 200V | 400V | 575V | 690V
VM_DC_VOLTAGE_SET[MAX] | 400 | 800 | 955 | 1150

VM_DC_VOLTAGE_SET[MIN] = 0

Identifier | VM_DRIVE_CURRENT
--- | ---
Description | Range applied to parameters showing current in A
Units | A
Range of [MIN] | -99999.999 to 0.000
Range of [MAX] | 0.000 to 99999.999

VM_DRIVE_CURRENT[MAX] is equivalent to the full scale (over current trip level) for the drive and is given by Full Scale Current Kc (11.061).

VM_DRIVE_CURRENT[MIN] = - VM_DRIVE_CURRENT[MAX]

Identifier | VM_DRIVE_CURRENT_UNIPOLAR
--- | ---
Description | Unipolar version of VM_DRIVE_CURRENT
Units | A
Range of [MIN] | 0.000
Range of [MAX] | 0.000 to 99999.999

VM_DRIVE_CURRENT_UNIPOLAR[MAX] = VM_DRIVE_CURRENT[MAX]

VM_DRIVE_CURRENT_UNIPOLAR[MIN] = 0.000

Identifier | VM_HIGH_DC_VOLTAGE
--- | ---
Description | Range applied to the parameters showing high d.c. voltage
Units | V
Range of [MIN] | 0
Range of [MAX] | 0 to 1500

VM_HIGH_DC_VOLTAGE[MAX] = 1500. This is the full scale d.c. link voltage feedback for the high d.c. link voltage measurement which can measure the voltage if it goes above the normal full scale value.

VM_HIGH_DC_VOLTAGE[MIN] = 0

Identifier | VM_LOW_UNDER_VOLTS
--- | ---
Description | Range applied to the low under voltage threshold
Units | V
Range of [MIN] | 24
Range of [MAX] | 24 to 1150

If Back-up Mode Enable (06.068) = 0
VM_LOW_UNDER_VOLTS[MAX] = VM_STD_UNDER_VOLTS[MIN]

Otherwise
VM_LOW_UNDER_VOLTS[MAX] = VM_STD_UNDER_VOLTS[MIN] / 1.1.

VM_LOW_UNDER_VOLTS[MIN] = 0.

Identifier | VM_MIN_SWITCHING_FREQUENCY
--- | ---
Description | Range applied to the minimum switching frequency parameter
Units | User units
Range of [MIN] | 0
Range of [MAX] | 0 to 6

VM_MIN_SWITCHING_FREQUENCY[MAX] = Maximum Switching Frequency (05.018)

VM_MIN_SWITCHING_FREQUENCY[MIN] = 0 for motor control modes, or 1 for Regen mode (subject to the maximum)

Identifier | VM_MOTOR1_CURRENT_LIMIT
--- | ---
Description | Range applied to current limit parameters (motor 1)
Units | %
Range of [MIN] | 0.0
Range of [MAX] | 0.0 to 1000.0

VM_MOTOR1_CURRENT_LIMIT[MAX] is dependent on the drive rating and motor set-up parameters.

VM_MOTOR1_CURRENT_LIMIT[MIN] = 0.00

Identifier | VM_MOTOR2_CURRENT_LIMIT
--- | ---
Description | Range applied to current limit parameters (motor 2)
Units | %
Range of [MIN] | 0.0
Range of [MAX] | 0.0 to 1000.0

VM_MOTOR2_CURRENT_LIMIT[MAX] is dependent on the drive rating and motor set-up parameters.

VM_MOTOR2_CURRENT_LIMIT[MIN] = 0.0

Identifier | VM_NEGATIVE_REF_CLAMP1
--- | ---
Description | Limits applied to the negative frequency or speed clamp (motor 1)
Units | Open-loop: Hz RFC-A, RFC-S: rpm or mm/s
Range of [MIN] | Open-loop: -550.0 to 0.0 RFC-A, RFC-S: -50000.0 to 0.0
Range of [MAX] | Open-loop: 0.0 to 550.0 RFC-A, RFC-S: 0.0 to 50000.0

This variable maximum/minimum defines the range of the negative frequency or speed clamp associated with motor map 1 (Minimum Reference Clamp (01.007)). The minimum and maximum are affected by the settings of the Negative Reference Clamp Enable (01.008), Bipolar Reference Enable (01.010) and Maximum Reference Clamp (01.006) as shown in the table below.

Negative Reference Clamp Enable (01.008) | Bipolar Reference Enable (01.010) | VM_NEGATIVE_REF_CLAMP1[MIN] | VM_NEGATIVE_REF_CLAMP1[MAX]
0 | 0 | 0.0 | Pr 01.006
0 | 1 | 0.0 | 0.0
1 | X | -VM_POSITIVE_REF_CLAMP[MAX] | 0.0

Identifier | VM_NEGATIVE_REF_CLAMP2
--- | ---
Description | Limits applied to the negative frequency or speed clamp (motor 2)
Units | Open-loop: Hz RFC-A, RFC-S: rpm or mm/s
Range of [MIN] | Open-loop: -550.0 to 0.0 RFC-A, RFC-S: -50000.0 to 0.0
Range of [MAX] | Open-loop: 0.0 to 550.0 RFC-A, RFC-S: 0.0 to 50000.0

This variable maximum/minimum defines the range of the negative frequency or speed clamp associated with motor map 2 (M2 Minimum Reference Clamp (21.002)). It is defined in the same way as VM_NEGATIVE_REF_CLAMP1 except that the M2 Maximum Reference Clamp (21.001) is used instead of Maximum Reference Clamp (01.006).

Identifier | VM_POSITIVE_REF_CLAMP1
--- | ---
Description | Limits applied to the positive frequency or speed reference clamp
Units | Open-loop: Hz RFC-A, RFC-S: rpm or mm/s
Range of [MIN] | Open-loop: 0.0 RFC-A, RFC-S: 0.0
Range of [MAX] | Open-loop: 550.0 RFC-A, RFC-S: 0.0 to 50000.0

VM_POSITIVE_REF_CLAMP1[MAX] defines the range of the positive reference clamp, Maximum Reference Clamp (01.006), which in turn limit the references. In RFC-A and RFC-S modes a limit is applied so that the position feedback does not exceed the speed where the drive can no longer interpret the feedback signal correctly as given in the table below. The limit is based on the position feedback device selected with Motor Control Feedback Select (03.026). It is possible to disable this limit if the RFC Feedback Mode (03.024) ≥ 1 (i.e. VM_POSITIVE_REF_CLAMP = 50000.0), so that the motor can be operated at a speed above the level where the drive can interpret the feedback in sensorless mode. It should be noted that the position feedback device itself may have a maximum speed limit that is lower than those given in the table. Care should be taken not to exceed a speed that would cause damage to the position feedback device.

Feedback device | VM_POSITIVE_REF_CLAMP1[MAX]
AB, AB Servo | (500kHz x 60 / rotary lines per revolution) rpm (500kHz x linear line pitch in mm) mm/s
FD, FR, FD Servo, FR Servo | (500kHz x 60 / rotary lines per revolution)/2 rpm (500kHz x linear line pitch in mm)/2 mm/s
SC, SC Hiper, SC EnDat, SC SSI, SC Servo | (500kHz x 60 / sine waves per revolution) rpm (500kHz x linear line pitch in mm) mm/s
Resolver | 30000 rpm (250Hz x pole pitch in mm) mm/s
Any other device | 50000.0 rpm or mm/s

The limit ensures that the frequency of incremental digital or sine wave signals from the encoder do not exceed 500kHz and the modulation frequency for a resolver does not exceed 1kHz, neglecting any speed controller overshoot. The position feedback resolution remains fixed over the whole frequency for digital signals, but reduces with increased frequency or reduced voltage with sine wave signals. The position resolution with sine wave signals is given by the equations below.

Position resolution for a rotary device = K x sine waves per revolution

Position resolution for a linear device = K x sine waves per pole pitch

The value of K varies with the frequency and magnitude of the sine wave signals. The nominal value of K is 1024, and the drive interface provides at least this resolution with 1.0Vp-p sine waves up to a frequency of 50kHz. The table below shows the variation of K with sine wave peak to peak voltage and frequency.

| 1kHz | 5kHz | 50kHz | 100kHz | 200kHz | 500kHz
1.2Vp-p | 2048 | 2048 | 1024 | 1024 | 512 | 512
1.0Vp-p | 2048 | 2048 | 1024 | 512 | 512 | 128
0.8Vp-p | 1024 | 1024 | 1024 | 512 | 256 | 128
0.6Vp-p | 1024 | 1024 | 512 | 512 | 256 | 128
0.4Vp-p | 512 | 512 | 512 | 256 | 128 | 64

VM_POSITIVE_REF_CLAMP[MAX] in Open-loop mode is fixed at 3000.0 as position feedback cannot be used for motor control.

VM_POSITIVE_REF_CLAMP[MIN] = 0.0

(Note: An additional limit is applied to ensure that the drive output frequency cannot exceed 550Hz. For Open-loop mode an additional limit of 550Hz is applied directly. For RFC modes the variable maximum is applied to the speed reference, and an additional limit of 550 x 60 / Motor pole pairs is applied.)

VM_POSITIVE_REF_CLAMP2[MAX] defines the range of the positive reference clamp, M2 Maximum Reference Clamp (21.001), which in turn limit the references. See VM_POSITIVE_REF_CLAMP1 for more details.

Identifier | VM_POWER
--- | ---
Description | Range applied to parameters that either set or display power
Units | kW
Range of [MIN] | -99999.999 to 0.000
Range of [MAX] | 0.000 to 99999.999

VM_POWER[MAX] is rating dependent and is chosen to allow for the maximum power that can be output by the drive with maximum a.c. output voltage, at maximum controlled current and unity power factor.

VM_POWER[MAX] = √3 x VM_AC_VOLTAGE[MAX] x VM_DRIVE_CURRENT[MAX] / 1000

VM_POWER[MIN] = -VM_POWER[MAX]

Identifier | VM_RATED_CURRENT
--- | ---
Description | Range applied to rated current parameters
Units | A
Range of [MIN] | 0.000
Range of [MAX] | 0.000 to 99999.999

VM_RATED_CURRENT [MAX] = Maximum Rated Current (11.060) and is dependent on the drive rating.

VM_RATED_CURRENT [MIN] = 0.000

Identifier | VM_REGEN_REACTIVE
--- | ---
Description | Range applied to the reactive current reference in Regen mode
Units | %
Range of [MIN] | -1000.0 to 0.0
Range of [MAX] | 0.0 to 1000.0

VM_REGEN_REACTIVE[MAX] applies a limit to the reactive current reference in Regen mode so that the total current reference does not exceed its maximum allowed level.

VM_REGEN_REACTIVE[MIN] = - VM_REGEN_REACTIVE[MAX]

Identifier | VM_SPEED
--- | ---
Description | Range applied to parameters showing speed
Units | Open-loop, RFC-A, RFC-S: rpm or mm/s
Range of [MIN] | Open-loop, RFC-A, RFC-S: -50000.0 to 0.0
Range of [MAX] | Open-loop, RFC-A, RFC-S: 0.0 to 50000.0

This variable minimum/maximum defines the range of speed monitoring parameters. To allow headroom for overshoot the range is set to twice the range of the speed references.

VM_SPEED[MIN] = 2 x VM_SPEED_FREQ_REF[MIN]

VM_SPEED[MAX] = 2 x VM_SPEED_FREQ_REF[MAX]

Identifier | VM_SPEED_FREQ_KEYPAD_REF
--- | ---
Description | Range applied to the keypad reference
Units | Open-loop: Hz RFC-A, RFC-S: rpm or mm/s
Range of [MIN] | Open-loop: -550.0 to 550.0 RFC-A, RFC-S: -50000.0 to 50000.0
Range of [MAX] | Open-loop: 0.0 to 550.0 RFC-A, RFC-S: 0.0 to 50000.0

This variable maximum is applied to Keypad Control Mode Reference (01.017). The maximum applied to these parameters is the same as other frequency reference parameters.

VM_SPEED_FREQ_USER_REFS [MAX] = VM_SPEED_FREQ_REF[MAX]

However the minimum is dependent on Negative Reference Clamp Enable (01.008) and Bipolar Reference Enable (01.010).

Negative Reference Clamp Enable (01.008) | Bipolar Reference Enable (01.010) | VM_SPEED_FREQ_USER_REFS[MIN]
0 | 0 | If Select Motor 2 Parameters (11.045) = 0 Minimum Reference Clamp (01.007), otherwise M2 Minimum Reference Clamp (21.002)
0 | 1 | -VM_SPEED_FREQ_REF[MAX]
1 | 0 | 0.0
1 | 1 | -VM_SPEED_FREQ_REF[MAX]

Identifier | VM_SPEED_FREQ_REF
--- | ---
Description | Range applied to the frequency or speed reference parameters
Units | Open-loop: Hz RFC-A, RFC-S: rpm or mm/s
Range of [MIN] | Open-loop: -550.0 to 0.0 RFC-A, RFC-S: -50000.0 to 0.0
Range of [MAX] | Open-loop: 0.0 to 550.0 RFC-A, RFC-S: 0.0 to 50000.0

This variable minimum/maximum is applied throughout the frequency and speed reference system so that the references can vary in the range from the minimum to maximum clamps.

Negative Reference Clamp Enable (01.008) | VM_SPEED_FREQ_REF[MAX] if Select Motor 2 Parameters (11.045) = 0 | VM_SPEED_FREQ_REF[MAX] if Select Motor 2 Parameters (11.045) = 1
0 | Maximum Reference Clamp (01.006) | M2 Maximum Reference Clamp (21.001)
1 | Maximum Reference Clamp (01.006) or |Minimum Reference Clamp (01.007)| whichever the larger | M2 Maximum Reference Clamp (21.001) or |M2 Minimum Reference Clamp (21.002)| whichever the larger

VM_SPEED_FREQ_REF[MIN] = -VM_SPEED_FREQ_REF[MAX].

Identifier | VM_SPEED_FREQ_REF_UNIPOLAR
--- | ---
Description | Unipolar version of VM_SPEED_FREQ_REF
Units | Open-loop: Hz RFC-A, RFC-S: rpm or mm/s
Range of [MIN] | Open-loop: 0.0 RFC-A, RFC-S: 0.0
Range of [MAX] | Open-loop: 0.0 to 550.0 RFC-A, RFC-S: 0.0 to 50000.0

VM_SPEED_FREQ_REF_UNIPOLAR[MAX] = VM_SPEED_FREQ_REF[MAX]

VM_SPEED_FREQ_REF_UNIPOLAR[MIN] = 0.0

Identifier | VM_SPEED_FREQ_USER_REFS
--- | ---
Description | Range applied to analogue reference parameters
Units | Open-loop: Hz RFC-A, RFC-S: rpm or mm/s
Range of [MIN] | Open-loop: -550.00 to 550.00 RFC-A, RFC-S: -50000.0 to 50000.0
Range of [MAX] | Open-loop: 0.0 to 550.00 RFC-A, RFC-S: 0.0 to 50000.0

This variable maximum is applied to Analogue Reference 1 (01.036) and Analogue Reference 2 (01.037). It should be noted that in Open-loop mode the analogue reference parameters have two decimal places.

The maximum applied to these parameters is the same as other frequency reference parameters.

VM_SPEED_FREQ_USER_REFS [MAX] = VM_SPEED_FREQ_REF[MAX]

However the minimum is dependent on Negative Reference Clamp Enable (01.008) and Bipolar Reference Enable (01.010).

Negative Reference Clamp Enable (01.008) | Bipolar Reference Enable (01.010) | VM_SPEED_FREQ_USER_REFS[MIN]
0 | 0 | If Select Motor 2 Parameters (11.045) = 0 Minimum Reference Clamp (01.007), otherwise M2 Minimum Reference Clamp (21.002)
0 | 1 | -VM_SPEED_FREQ_REF[MAX]
1 | 0 | 0.0
1 | 1 | -VM_SPEED_FREQ_REF[MAX]

Identifier | VM_STD_UNDER_VOLTS
--- | ---
Description | Range applied to the standard under voltage threshold
Units | V
Range of [MIN] | 0 to 1150
Range of [MAX] | 0 to 1150

VM_STD_UNDER_VOLTS[MAX] = VM_DC_VOLTAGE_SET / 1.1

VM_STD_UNDER_VOLTS[MIN] is voltage rating dependent. See the table below.

Voltage level | 200V | 400V | 575V | 690V
VM_STD_UNDER_VOLTS[MIN] | 175 | 330 | 435 | 435

Identifier | VM_SUPPLY_LOSS_LEVEL
--- | ---
Description | Range applied to the supply loss threshold
Units | V
Range of [MIN] | 0 to 1150
Range of [MAX] | 0 to 1150

VM_SUPPLY_LOSS_LEVEL[MAX] = VM_DC_VOLTAGE_SET[MAX]

VM_SUPPLY_LOSS_LEVEL[MIN] is drive voltage rating dependent. See the table below.

Voltage level | 200V | 400V | 575V | 690V
VM_SUPPLY_LOSS_LEVEL[MIN] | 205 | 410 | 540 | 540

Identifier | VM_SWITCHING_FREQUENCY
--- | ---
Description | Range applied to the maximum switching frequency parameters
Units | User units
Range of [MIN] | 0
Range of [MAX] | 0 to 6

VM_SWITCHING_FREQUENCY[MAX] = Power stage dependent

VM_SWITCHING_FREQUENCY[MIN] = 0 for motor control modes, or 1 for Regen mode (subject to the maximum)

Identifier | VM_TORQUE_CURRENT
--- | ---
Description | Range applied to torque and torque producing current parameters. (Where this is used in Regen mode it refers to the active current.)
Units | %
Range of [MIN] | -1000.0 to 0.0
Range of [MAX] | 0.0 to 1000.0

Select Motor 2 Parameters (11.045) | VM_TORQUE_CURRENT[MAX]
0 | VM_MOTOR1_CURRENT_LIMIT[MAX]
1 | VM_MOTOR2_CURRENT_LIMIT[MAX]

VM_TORQUE_CURRENT[MIN] = -VM_TORQUE_CURRENT[MAX]

Identifier | VM_TORQUE_CURRENT_UNIPOLAR
--- | ---
Description | Unipolar version of VM_TORQUE_CURRENT
Units | %
Range of [MIN] | 0.0
Range of [MAX] | 0.0 to 1000.0

VM_TORQUE_CURRENT_UNIPOLAR[MAX] = VM_TORQUE_CURRENT[MAX]

VM_TORQUE_CURRENT_UNIPOLAR[MIN] =0.0

Identifier | VM_USER_CURRENT
--- | ---
Description | Range applied to torque reference and percentage load parameters with one decimal place
Units | %
Range of [MIN] | -1000.0 to 0.0
Range of [MAX] | 0.0 to 1000.0

VM_USER_CURRENT[MAX] = User Current Maximum Scaling (04.024)

VM_USER_CURRENT[MIN] = -VM_USER_CURRENT[MAX]

Identifier | VM_USER_CURRENT_HIGH_RES
--- | ---
Description | Range applied to torque reference and percentage load parameters with two decimal places
Units | %
Range of [MIN] | -1000.00 to 0.00
Range of [MAX] | 0.00 to 1000.00

VM_USER_CURRENT_HIGH_RES[MAX] = User Current Maximum Scaling (04.024) with an additional decimal place

VM_USER_CURRENT_HIGH_RES[MIN] = -VM_USER_CURRENT_HIGH_RES[MAX]