Siemens SINAMICS S150 - Page 294

Acceptance test and acceptance report
10.5 Acceptance tests
Safety Integrated
294 Function Manual, 05/2010, A5E03264275A
Example Trace SSM (with hysteresis)
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Figure 10-8 Example Trace SSM (with hysteresis)
Trace evaluation:
● Drive is accelerated (time axis from approx. -300 ms)
● SSM limit value (p9546/p9346) is exceeded (time axis 0 ms)
● Bit "SSM (speed below limit value)" is set to 0 (time axis 0 ms)
● Drive is braked again (time axis approx. 750 ms)
● Hysteresis active: The bit cited above is only set to 1 again if the speed falls below the
SSM limit value minus the hysteresis value (p9547/p9347) (time axis approx. 1080 ms)
Note
Small time differences (of the order of 2 to 3 Safety clock cycles (here up to 36 ms)) are
caused by internal calculations and do not present a problem.