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198 HVAC Drive H300
Issue Number: 3
11.1 Parameter ranges and Variable minimum/maximums:
Some parameters in the drive have a variable range with a variable minimum and a variable maximum values which is dependent on one of the
following:
• The settings of other parameters
• The drive rating
• The drive mode
• Combination of any of the above
The tables below give the definition of variable minimum/maximum and the maximum range of these.
VM_AC_VOLTAGE Range applied to parameters showing AC voltage
Units V
Range of [MIN] 0
Range of [MAX] 0 to 930
Definition
VM_AC_VOLTAGE[MAX] is drive voltage rating dependent. See Table 11-4
VM_AC_VOLTAGE[MIN] = 0
VM_AC_VOLTAGE_SET Range applied to the AC voltage set-up parameters
Units V
Range of [MIN] 0
Range of [MAX] 0 to 690
Definition
VM_AC_VOLTAGE_SET[MAX] is drive voltage rating dependent. See Table 11-4
VM_AC_VOLTAGE_SET[MIN] = 0
VM_ACCEL_RATE Maximum applied to the ramp rate parameters
Units s / 100 Hz, s / 1000 rpm, s / 1000 mm/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
Definition
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 100 Hz 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 / 1000 rpm or 3200.000 s / 1000 mm/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
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