Siemens SINAMICS S200 - Discrepancy Time

9.8.5.3 Discrepancy time
Overview
During the discrepancy time, the converter tolerates inconsistent input signals.
Description of function
The converter monitors at the two input terminals of the F-DI whether the input signals attain
the same logical signal state within the discrepancy time. For electromechanical sensors, for
example, EMERGENCY STOP buttons or position switches, the two sensor contacts never switch
at precisely the same time. The input signals of the F-DI are inconsistent (discrepancy).
During the discrepancy time, the converter tolerates inconsistent input signals. The
discrepancy time does not extend the converter response time.
A permanent discrepancy signi󹪝es an error in the F-DI interconnection. In this case, the
converter responds with a safety message.
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Figure9-13 Permanent discrepancy
The discrepancy time must be set so that it is always less than the smallest expected
switching interval of t
he signal at this F-DI, see the illustration below.
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Figure9-14 Discrepancy time
Note
ForS200PTI, the discrepancy time is 󹪝xed t
o 500ms.
Functions
9.8Safety Integrated (for S200 PTI only)
SINAMICS S200 pulse train servo drive system with SIMOTICS S-1FL2
288 Operating Instructions, 11/2023, FW V6.3, A5E51646767B AA