Emerson Powerdrive F300 Reference Manual page 14

Identifier
Description Range applied to current limit parameters (motor 1)
Units %
Range of [MIN] 0.0
Range of [MAX] 0.0 to 1000.0
VM_MOTOR1_CURRENT_LIMIT[MAX] is dependent on the drive rating and motor set-up parameters.
VM_MOTOR1_CURRENT_LIMIT[MIN] = 0.00
Identifier
Description Range applied to current limit parameters (motor 2)
Units %
Range of [MIN] 0.0
Range of [MAX] 0.0 to 1000.0
VM_MOTOR2_CURRENT_LIMIT[MAX] is dependent on the drive rating and motor set-up parameters.
VM_MOTOR2_CURRENT_LIMIT[MIN] = 0.0
Identifier
Description Limits applied to the negative frequency or speed clamp (motor 1)
Open-loop: Hz
Units
RFC-A, RFC-S: rpm or mm/s
Open-loop: -550.0 to 0.0
Range of [MIN]
RFC-A, RFC-S: -50000.0 to 0.0
Open-loop: 0.0 to 550.0
Range of [MAX]
RFC-A, RFC-S: 0.0 to 50000.0
This variable maximum/minimum defines the range of the negative frequency or speed clamp associated with motor map 1 (Minimum Reference Clamp
(01.007)). The minimum and maximum are affected by the settings of the Negative Reference Clamp Enable (01.008), Bipolar Reference Enable
(01.010) and Maximum Reference Clamp (01.006) as shown in the table below.
Negative Bipolar
Reference Reference
Clamp Enable Enable
(01.008) (01.010)
0 0
0 1
1 X
Identifier
Description Limits applied to the negative frequency or speed clamp (motor 2)
Open-loop: Hz
Units
RFC-A, RFC-S: rpm or mm/s
Open-loop: -550.0 to 0.0
Range of [MIN]
RFC-A, RFC-S: -50000.0 to 0.0
Open-loop: 0.0 to 550.0
Range of [MAX]
RFC-A, RFC-S: 0.0 to 50000.0
This variable maximum/minimum defines the range of the negative frequency or speed clamp associated with motor map 2 (M2 Minimum Reference
Clamp (21.002)). It is defined in the same way as VM_NEGATIVE_REF_CLAMP1 except that the M2 Maximum Reference Clamp (21.001) is used
instead of Maximum Reference Clamp (01.006).
Identifier
Description Limits applied to the positive frequency or speed reference clamp
Open-loop: Hz
Units
RFC-A, RFC-S: rpm or mm/s
Open-loop: 0.0
Range of [MIN]
RFC-A, RFC-S: 0.0
Open-loop: 550.0
Range of [MAX]
RFC-A, RFC-S: 0.0 to 50000.0
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 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 as given in the table below. 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) ≥ 1 (i.e. VM_POSITIVE_REF_CLAMP = 50000.0), so
that the motor can be operated at a speed above the level where the drive can interpret the feedback in sensorless mode. It should be noted that the
position feedback device itself may have a maximum speed limit that is lower than those given in the table. Care should be taken not to exceed a speed
that would cause damage to the position feedback device.
14
VM_MOTOR1_CURRENT_LIMIT
VM_MOTOR2_CURRENT_LIMIT
VM_NEGATIVE_REF_CLAMP1
VM_NEGATIVE_REF_CLAMP1[MIN] VM_NEGATIVE_REF_CLAMP1[MAX]
0.0
0.0
-VM_POSITIVE_REF_CLAMP[MAX] 0.0
VM_NEGATIVE_REF_CLAMP2
VM_POSITIVE_REF_CLAMP1
Pr 01.006
0.0
Powerdrive F300 Parameter Reference Guide
Issue: 01.15.00