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
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