Function Of Sos - Siemens Simatic ET 200SP Equipment Manual

Parameters/address space
4.9 Safety functions
4.9.1.1

Function of SOS

The SOS function monitors the count value
and notifies the user if the encoder/count
deviates more than a defined amount from
the stopped position.
Example of how the function can be used
Example
A protective door can only be opened if a machine
is in the safe standstill state.
52
SOS Selection
Possible solution
• Stop the movement of the hazard from your
safety program.
• Ensure no further movement as follows:
Engage/energize (brake/motor)
–
Engage the safety related actuator
–
• Enable SOS monitoring in the counter mod-
ule via the safety program in the F-CPU
• Disable the door lock to permit access to the
machine
• Perform an appropriate safety reaction if the
"Safe Stop Event" ever occurs
ET 200SP F-TM Count 1x1Vpp sin/cos HF (6ES7136-6CB00-0CA0)
Equipment Manual, V1.0, 01/2021, A5E47073911-AA