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48 Unidrive M100 / M101 Control User Guide
Issue Number: 1
VM_DC_VOLTAGE_SET Range applied to DC voltage reference parameters
Units V
Range of [MIN] 0
Range of [MAX] 0 to 1150
Definition
VM_DC_VOLTAGE_SET[MAX] is drive voltage rating dependent. See Table 10-4
VM_DC_VOLTAGE_SET[MIN] = 0
VM_DRIVE_CURRENT Range applied to parameters showing current in A
Units A
Range of [MIN] -9999.99 to 0.00
Range of [MAX] 0.00 to 9999.99
Definition
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]
VM_FREQ Range applied to parameters showing frequency
Units Hz
Range of [MIN] -1100.00
Range of [MAX] 1100.00
Definition
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_FREQ[MIN] = 2 x VM_SPEED_FREQ_REF[MIN]
VM_FREQ[MAX] = 2 x VM_SPEED_FREQ_REF[MAX]
VM_MAX_SWITCHING_FREQUENCY Range applied to the maximum switching frequency parameters
Units User units
Range of [MIN] Open-loop: 0 (0.667 kHz)
Range of [MAX] Open-loop: 8 (16kHz)
Definition
VM_SWITCHING_FREQUENCY[MAX] = Power stage dependent
VM_SWITCHING_FREQUENCY[MIN] = 0
This variable maximum is used by the Minimum Switching Frequency (05.038) to define the minimum frequency limit
used if the inverter thermal model is actively reducing the switching frequency due to temperature.
Note that parameter Maximum Switching Frequency (05.018) takes priority over parameter Minimum Switching
Frequency (05.038) so is not limited by parameter Minimum Switching Frequency (05.038). The actual minimum
switching frequency limit used is the lower of Maximum Switching Frequency (05.018) and Minimum Switching
Frequency (05.038).
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