Siemens SINAMICS S150 NEMA Operating Instructions Manual page 486

Converter cabinet units

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Setpoint channel and closed-loop control

7.4 Vector speed/torque control with/without an encoder

The value specifies the maximum permissible torque whereby different limits can be

parameterized for motor and regenerative mode.

The currently active torque limit values are displayed in the following parameters:

All of the following limits act on the torque setpoint – that is either available at the speed

controller output for closed-loop speed control or as torque input, for closed-loop torque

control. The minimum or the maximum is used for the various limits. This minimum or

maximum is cyclically calculated and is displayed in the following parameters:

These cyclical values therefore limit the torque setpoint at the speed controller output/torque

input or indicate the instantaneous max. possible torque. If the torque setpoint is limited, then

this is displayed using the following parameters:

Function diagrams

Current limit

CO: Torque limit, upper/motoring

CO: Torque limit, lower/regenerative

CI: Torque limit, upper/motoring

CI: Torque limit, lower/regenerative

CO: Torque limit, upper/motoring, scaling

CO: Torque limit, lower/regenerative scaling

Power limit, motoring

Power limit, regenerating

Maximum drive output current

Torque limit, upper/motoring without offset

Torque limit, lower/regenerative without offset

Upper effective torque limit

Lower effective torque limit

Upper torque limit active

Lower torque limit active

Torque setpoint

Upper/lower torque limit

Current/power/torque limits

Operating Instructions, 12/2018, A5E36652151A

Enclosed Drives