● Larger proportional gain leads to faster response.
● Too large proportional gain may cause oscillation.
● Smaller proportional gain leads to slower response.
● Larger integral time leads to slower dynamic response of the system
and the control on external disturbance is weakened.
● Smaller integral time leads to faster dynamic response of the system.
● Excessively small integral time may cause oscillation.
If the factory defaults can not meet the application requirements, the parame‐
ters can be adjusted in the following manner:
● The proportional gain should be increased without causing oscillation.
● The integral time should be decreased to allow the system to have quick
response and smaller overshoot.
Improper settings may lead to excessive speed overshoot or
overvoltage faults during fall back from the overshoot.
S1.02
Torque limit Factory default 150.0
Setting range 0.0...200.0 % Minimum unit 0.1
Used to limit the maximum torque current of the frequency converter during
startup or braking. The limit value is a percentage of rated motor current.
If a large brake torque is required, apply the torque limit function
together with dynamic brake.
S1.03
Slip compensation gain Factory default 100.0
Setting range 50.0...250.0 % Minimum unit 0.1
Used to maintain constant motor speeds with load changes. When the load
increases, the motor slip increases, and the rotation speed decreases.
Increase this value when the motor is heavily loaded and has a
low speed, and vice versa.
S1.04
Torque control selection Factory default 0
Setting range
0: Digital inputs control
1: Always active
Minimum unit 1
● 0: Digital inputs control
The multi-function digital inputs can be used to switch between torque
control and speed control (see parameters in group E0).
– Speed control
– Speed commands are used to control motor actions and the
speed controller is active.
– Output frequency changes according to set frequency and the
output torque changes with the load torque.
– The output torque is limited by ‘Torque limit’ [S1.02]. If the
load torque is larger than ‘Torque limit’ [S1.02], the output fre‐
quency will be different from set frequency because of torque
limitation.
DOK-RCON02-FV*********-IB08-EN-P Bosch Rexroth AG 119/259
Rexroth Frequency Converter Fv
Parameter Settings
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