Safe Speed Monitor (Ssm) - Siemens SINAMICS S120 Function Manual

3.2.8

Safe Speed Monitor (SSM)

Definition according to EN 61800-5-2:
"The SSM function supplies a safe
output signal to indicate whether the
motor speed is below a specified limit
value."
Note
SSM is a pure signaling function
Contrary to other Safety Integrated functions, a violation of the SSM limit does not result in a
drive-based stop response.
Example of how the function can be used
Example
A centrifuge may only be filled below a velocity
defined by the user.
Safety Integrated
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Overview of Safety Integrated functions
3.2 Safety Integrated Extended Functions
Possible solution
SSM is activated by configuring the Safety
•
Integrated Extended Functions.
The converter safely monitors the centrifuge
•
speed and enables the process to advance
to the next step using the "Status SSM" sta-
tus bit.
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