Bit Pattern Test - Siemens Sinamics S120 Function Manual

5.2.2

Bit pattern test

Bit pattern test of fail-safe outputs
The converter normally responds immediately to signal changes in its fail-safe inputs. This is
not desired in the following case: Several control modules test their fail-safe outputs using bit
pattern tests (on/off tests), in order to identify faults due to either short-circuit or cross-circuit
faults. When you interconnect a fail-safe input of the converter with a fail-safe output of a
control module, the converter responds to these test signals.
Image 5-3
Not e
Debounce time for unwanted triggering of S afety Integrated f unctions
If the test pulses cause an unwanted triggering of the Safety Integrated functions, these test
pulses can be suppressed using the F-DI input filter (p9651 for Basic Functions or p10017
for Extended Functions). To do this, a value must be entered in p9651 or p10017 that is
greater than the duration of a test pulse.
Ov erview of important parameters (see SINAMICS S120/S150 List Manual)
• p9651
• p10017
Safety Integrated
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
5.2 Control signals by way of terminals on the Control Unit and Motor / Power Module
Converter response to a bit pattern test
SI STO/SBC/SS1 debounce time (Control Unit)
SI Motion digital inputs debounce time (processor 1)
Control of the safety functions
173