Emerson Powerdrive F300 - Page 175

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Powerdrive F300 User Guide 175
Issue Number: 2
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: -33000.0 to 0.0
Range of [MAX]
Open-loop: 0.0 to 550.0
RFC-A, RFC-S: 0.0 to 33000.0
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]
00 0.0 Pr 01.006
01 0.0 0.0
1 X -VM_POSITIVE_REF_CLAMP[MAX] 0.0
VM_POSITIVE_REF_CLAMP1
Limits applied to the positive frequency or speed reference clamp
VM_POSITIVE_REF_CLAMP2
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 33000.0
Definition
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 open-loop mode VM_POSITIVE_REF_CLAMP1[MAX] is fixed at 550.0 Hz
In RFC mode a limit is applied to the speed reference of 550 x 60 / Motor pole pairs. Therefore, with a 4 pole motor the
limit for VM_POSITIVE_REF_CLAMP1[MAX] will be 16,500 rpm.
VM_POSITIVE_REF_CLAMP1[MIN] = 0.0
VM_POSITIVE_REF_CLAMP2 is defined in the same way as VM_POSITIVE_REF_CLAMP1 except
VM_POSITIVE_REF_CLAMP2[MAX] defines the range of the positive reference clamp, M2 Maximum Reference
Clamp (21.001), which in turn limits the references.