Siemens SINAMICS G220 - Page 677

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Figure14-234 Principle of operation of the signal 󹪝lter
The signal 󹪝lter smooths the speed measured value.
The 󹪝lter reduces signal changes of the SSM feedback when monitoring speeds that lie just
below the speed limit.
An active 󹪝lter results in a time delay of the SSM feedback.
The response of the signal 󹪝lter can be set using the 󹪝lter time (p9545).
Example
SSM is suitable for enabling access to the machine by way of safe SSM feedback. For example,
it is possible to unlock safety doors only when the speed falls below critical levels.
Note
SSM initial value when running up
The initial value of the SSM signal when running up can be adapted using p9507.9.
• p9507.9 = 0 means "SSM status signal when running up initialized to '1'".
• p9507.9 = 1 means "SSM status signal when running up initialized to '0'".
Parameters
The following list contains the parameters of the "Safe Speed Monitor (SSM)" function.
Number Name Unit
p9545 SI SSM 󹪝lter time [ms]
p9546 SI SSM velocity limit [mm/min]
p9546 SI SSM velocity limit [rpm]
p9547 SI SSM velocity hysteresis [mm/min]
p9547 SI SSM velocity hysteresis [rpm]
p9603.0...1 SI control 
p9604.0...30 SI enable 
r9714[0...4] SI diagnostics velocity [mm/min]
r9714[0...4] SI diagnostics velocity [rpm]
r9720.0...15 SI control word 
Functions
14.12Safety Integrated
SINAMICS G220 converter
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB 675