KEB COMBIVERT F5-A, Applications Manual, Page: 257 / 552

Torque control
© KEB, 2012-10 COMBIVERT F5-A, -E, -H Page 7.9 - 3
7
7.9 Torque control
In torque-controlled operation, the user directly specifies the torque the motor is to deliver, until the speed target
value is reached.
7.9.1. Torque reference source
The set torque is calculated from the value in parameter cS.19 multiplied with a factor (0 .. 100%) which can
be preset by different sources (analog inputs, motorpoti, etc.). The selection of the torque reference source is
made by parameter cS.15.
cS.15: Torque reference source
Value Explanation
0: analog REF Parameter „Selection REF-input / AUX function“ (
An.30) defines, how the Ref- or Aux-
value is calculated (see chapter 7.2). As standard AN1 is the Ref-value and AN2 the
Aux-value. They are limited to 100% as a multiplier for cS.19.
1: analog Aux
2: digital absolute
(cS.19...23)
the value in cS.19 forms directly the torque reference
3: digital % (cS.18) cS.18 is factor for cS.19
4: Motorpoti
(ru.37) the output value of the motorpoti function (see chapter xx) is the factor for the torque
limits (cS.19...cS.23)
5: external PID
output (ru.57) the output value of the PID-controller (see chapter xx) is the factor for cS.19
The output value can be read out in ru.57
6: AN2 direct
(+/- 10V)
Analog input value AN2 is the factor for cS.19.
The analog input is scannned and processed in faster steps with this adjustment. To
realize this faster processing, the following parameters do not have any function: „AN2
noise filter“ (
An.11), „AN2 offset Y“ (An.17), „AN2 zero clamp“ (An..14), „AN2 save
mode“ (An.12).
The value of AN2 is limited as multiplier to 100%.
The superior torque limitations, such as "max. torque FI "(dr.15) still remain effective.
7.9.2. Rate of change torque reference
The rate of change of the torque reference can be limited with cS.16 .
cS.16: Ramp time torque reference
Value Explanation
0: off Torque reference is transferred directly without ramp
1...60000 ms
The maximum rate of change for the torque reference is rated motor torque per adju-
sted ramp time (CS.16).