Selecting Ssm When The Motor Is Switched On - Siemens Sinamics G120 Function Manual

6.7.2

Selecting SSM when the motor is switched on

Description
The safety function SSM cannot be selected or deselected using external control signals. SSM
is active if all of the following conditions are met:
● You have enabled one or several extended safety functions.
● For the SSM function, you have set a monitoring speed of > 0.
After switching on the power supply voltage, initially the inverter always sets the feedback
signal "Speed below limit value" of the SSM function to 0.
When the motor is switched on, the inverter compares the load speed with the speed limit.
Figure 6-35
Inverter signal
SSM feedback signal active (speed
below limit value)
ON/OFF1
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD
Time response of the safety function SSM (Safe Speed Monitor)
Parameter Included in the PROFI‐
safe telegram
r9722.15
r0054.0
6.7 Safe Speed Monitor (SSM)
Can be interconnec‐
ted with
F-DI
✓ ---
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Operation
F-DO
✓
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