Rockwell Automation 160 SSC Series C FRN 7.xx - Manual (Page 52)

5-14 Parameters and Programming
71 [IR Compensation]
The programmed value adds a voltage to the output based on the torque current.
An additional 31 volts (150%) is added to 460 volt units to compensate for stator
resistance. 15.5 volts (150%) is added for 230 volt units. If the drive trips on an
F07 - Motor Overload fault, or has trouble accelerating to commanded speed,
this value should be reduced. A setting of 0% disables this function.
0/150 1% 50%
72 [Slip Compensation]
This parameter compensates for the inherent slip in an induction motor.
A frequency is added to the commanded output frequency based on torque
current. If motor shaft speed decreases significantly under heavy loads then this
value should be increased. A setting of 0.0 Hz disables the function. This
parameter along with P83 - [PI Process Reference] also activates PI control in
drives using Firmware Version FRN 7.06. See page 5-17 for PI Control Setup and
Activation instructions.
0.0/5.0 0.1 Hz 2.0 Hz
73 [Reverse Disable]
When this parameter is set to a 1, reverse is disabled. The reverse command
may come from the analog input, TB3-5, the keypad or a serial command. With
a negative analog input and reverse disabled, the frequency command will be
zero in bipolar mode and minimum frequency in unipolar mode. All digital reverse
inputs including two-wire Run Reverse will be ignored with reverse disabled.
Important: This parameter cannot be programmed while the drive is running.
0/1 Numeric
value 0
74 [Analog Select]
Settings: 0 = unipolar analog input 0 to +10V
1 = bipolar analog input -10 to +10V
Important: With this parameter set to bipolar (setting 1), the parameter settings
for P75 - [Analog Input Minimum] and P32 - [Minimum Frequency]
are ignored. In addition, all other reverse inputs (Program Keypad
Module, Remote Keypad Module, CopyCat Keypad Module, TB3-5
control terminal block, or serial communication module) are ignored
with the exception of when P46 - [Input Mode] is programmed to
setting 7. (This applies to drives with firmware version FRN 7.03 and
later.) When P46 - [Input Mode] setting 7 is active, and TB3-8 is
closed, the frequency source is P58 - [Internal Frequency] and the
direction will be commanded from the control terminal block (either
terminal TB3-5 or TB3-6).
Important: This parameter cannot be programmed while the drive is running.
0/1 Numeric
value 0
Program Group
No. Parameter Name/Description
Min./Max.
Range
Units
Factory
Default
ATTENTION: Hazard of personal injury or equipment damage
exists due to unpredictable changes in motor speed. Do not use
P72 - [Slip Compensation] and P83 - [Process Reference] to disable
PI control while the drive is running. Disable PI control only when
the drive is stopped.
This parameter applies only to the Analog Signal Follower model.