Bit Pattern Test - Siemens SINAMICS S120 Function Manual

Safety Integrated Basic Functions
11.8 Controlling via terminals on the Control Unit and Motor/Power Module
T
S
T
D
T
R
Figure 11-4
Overview of important parameters (see SINAMICS S120/S150 List Manual)
● p9650
● p9652
● p9658
● p10002
11.8.2

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.
Figure 11-5
664
Switching interval
Discrepancy time
Response time
Discrepancy time
SI SGE switchover discrepancy time (Control Unit)
SI Safe Stop 1 delay time (Control Unit)
SI transition time STOP F to STOP A (Control Unit)
SI Motion F-DI switchover discrepancy time (CPU 1)
Converter response to a bit pattern test
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Drive functions