Safe Speed Monitor (Ssm) - Siemens SINAMICS S210 Operating Instructions Manual

4.2.7

Safe Speed Monitor (SSM)

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Applications
SSM is suitable for the realization of enabling access to the machine by way of safe SSM
feedback. For example, to ensure that protective doors can only be unlocked when the critical
speeds fall below those specified.
Flow diagram
Behavior
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SINAMICS S210 servo drive system
Operating Instructions, 01/2019, A5E41702836B AC
● Function SSM is enabled with p9501.16.
● If the speed falls below the speed limit, the "Speed below limit value" signal is set.
● If the speed is greater than the limit, the "Speed below limit value" is not set.
Safety functions integrated in the drive
The Safe Speed Monitor function is used for
safely identifying when a speed limit is fallen
below in both directions of rotation, e.g. to
identify zero speed.
The drive provides a safe output signal for
further processing.
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4.2 Extended Functions
105