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Unidrive M702 User Guide
Issue Number: 3
VM_NEGATIVE_REF_CLAMP1
Limits applied to the negative frequency or speed clamp
VM_NEGATIVE_REF_CLAMP2
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
Definition
VM_NEGATIVE_REF_CLAMP2 is defined in the same way except that Pr
21.001
is used instead of Pr
01.006
.
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
VM_POSITIVE_REF_CLAMP
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
Definition
In open-loop mode VM_POSITIVE_REF_CLAMP[MAX] is fixed at 550.0
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. 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) = 2 or 3
(i.e. VM_POSITIVE_REF_CLAMP[MAX] = 50000.0). The table below shows how VM_POSITIVE_REF_CLAMP[MAX]
is defined for different feedback device types
In all modes VM_POSITIVE_REF_CLAMP[MIN] is fixed at 0.0
Feedback device
VM_POSITIVE_REF_CLAMP[MAX]
AB,
AB Servo
(500 kHz x 60 / rotary lines per revolution) rpm
(500 kHz / linear line pitch in mm) mm/s
FD, FR,
FD Servo, FR Servo
(500 kHz x 60 / rotary lines per revolution)/2 rpm
(500 kHz / linear line pitch in mm)/2 mm/s
SC,
SC Hiper, SC EnDat,
SC SSI, SC Servo
(500 kHz x 60 / sine waves per revolution) rpm
(500 kHz / linear sine wave pitch in mm) mm/s
Resolver
(1000 Hz x 60 / resolver pole pairs) rpm
(1000 Hz / pole pitch in mm / resolver pole pairs) mm/s
Any other device
50000.0 rpm or mm/s
VM_POWER
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
Definition
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]
Summary of Contents for Unidrive M702
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