Flow diagram SS1 with external stop (SS1E)
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SS1E is selected during operation (selection via the control bit of the selected PROFIsafe telegram
or via F-DI).
The converter signals the status "SS1 active" via the status bit of the PROFIsafe telegram to the
PLC for further processing.
The control system triggers the shutdown via the setpoint input. The SS1 delay time in the con‐
verter is started at the same time.
The motor is braked by the external setpoint input, and signals "SS1E selected" to the PLC.
STO is initiated automatically after the SS1 delay time expires (p9652).
The motor coasts down to a standstill. STO safely prevents an unwanted restart of the motor.
When SS1 is deselected (via PROFIsafe or F-DI), STO and SS1 are deactivated and the converter
goes into the "Ready for switching on" state.
The converter switches the motor on again with a positive signal edge at ON/OFF.
Note
SS1 cannot be interrupted
If SS1 is deselected again during this time, the STO function is selected and deselected again
immediately after the delay time has elapsed or the speed has dropped below the shutdown
speed. This terminates the SS1 function normally. It cannot be interrupted.
Setting the delay time for SS1
Select the SS1 delay time such that the converter can brake the motor down to standstill along
the OFF3 ramp in any state of the work process.
The OFF3 ramp-down time must be orientated to the actual braking capacity of the system or
machine.
Safety functions integrated in the drive
4.2 Basic Functions
SINAMICS S210 servo drive system
66 Operating Instructions, 12/2017, A5E41702836B AA
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