10.7.5.3 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 signies an error in the F-DI interconnection. In this case, the
converter responds with a safety message.
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Figure10-20 Permanent discrepancy
The discrepancy time must be set so that it is always less than the smallest expected
switching inter
val of the signal at this F-DI, see the illustration below.
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Figure10-21 Discrepancy time
Note
For S200PN, t
he discrepancy time is xed to 500ms.
Functions
10.7Safety Integrated (for S200 PN only)
SINAMICS S200 PROFINET servo drive system with SIMOTICS S-1FL2
404 Operating Instructions, 11/2023, FW V6.3, A5E51646752B AB