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ManualsBrandsSiemens ManualsHobEH.85M.21E
541542543544545546547548549550
Safety Integrated Functions
8.9 Acceptance test and acceptance report
Function Manual
542 Function Manual, 06/2012, 6SL3097-4AB10-0BP4
Example trace: SSM (without encoder) with hysteresis
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Figure 8-56 Example trace: SSM (without encoder) with hysteresis
Trace evaluation:
● Drive is accelerated (time axis from approx. -150 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 decelerated again (time axis approx. 470 ms)
● Hysteresis active: The above named bit is only set to 1 once more if the speed falls below
the SSM limit value minus the hysteresis value (p9547/p9347) (time axis approx. 670 ms)
Note
Small time differences (of the order of 2 to 3 Safety clock cycles (here, approx. 7 ms)) are
caused by internal calculations and do not present a problem.