Extended Setpoint Channel - Siemens Sinamics S120 Function Manual

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Extended setpoint channel

In the servo control mode, the extended setpoint channel is deactivated by default. If an

extended setpoint channel is required, it has to be activated. The extended setpoint channel

is always activated in the vector control mode.

Properties of servo control mode without the "extended setpoint channel" function module

● The setpoint is directly interconnected to p1155[D] (e.g. from a higher-level control or

● Dynamic Servo Control (DSC) only

● Deceleration ramp OFF1 via p1121[D]

● Deceleration ramp OFF3 via p1135[D]

● For PROFIdrive telegrams 2 to 103 and 999 only (free assignment)

● STW 1 bit 5 (freeze ramp-function generator), no function

Activating the "extended setpoint channel" function module in the

servo control mode

In the servo control mode, the "extended setpoint channel" function module can be activated

via the commissioning wizard or the drive configuration (configuring DDS).

You can check the current configuration in parameter r0108.8. Once you have set the

configuration, you have to download it to the Control Unit where it is stored in a non-volatile

memory (see the SINAMICS S120 Commissioning Manual).

When the "extended setpoint channel" function module for servo is activated, under certain

circumstances, the number of drives in the multi-axis group that can be controlled from a

Control Unit is reduced.

Drive functions

Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2

technology controller)

When using DSC, the "extended setpoint channel" is not used. This unnecessarily uses

the computation time of the Control Unit and, for servo, can be deactivated.

The deceleration ramp in p1121 is also effective when the "Extended setpoint channel" is

deactivated.

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