Efficient Networks Siemens Sinamics S120 - Manual (Page 47)

Drive Functions
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
47
Extended setpoint channel
2
Description
In the servo operating mode, the extended setpoint channel is deactivated by default. If an
extended setpoint channel is required, it has to be activated.
Properties of servo mode without the "extended setpoint channel" function module
● The setpoint is directly interconnected to p1155[D] (e.g. from a higher-level control or
technology controller)
● A higher number of motors can be controlled with one Control Unit at one setpoint source
by moving the ramp-function generator to the higher-level controller.
● Dynamic Servo Control (DSC) only
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 de-activated.
● Deceleration ramp OFF1 via p1121[DDS]
● Deceleration ramp OFF3 via p1135[DDS]
● For PROFIdrive telegrams 2 to 106 and 999 only (free assignment)
● STW 1 bit 5 (freeze ramp-function generator), no function
2.1 Activating the "extended setpoint channel" function module in servo
mode
In servo mode, the "extended setpoint channel" function module can be activated via the
commissioning Wizard or the drive configuration (configure 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).
Note
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.