Technical Description S5-115F Manual
• Long discrepancy time
Long discrepancy times are defined if discrepancies at the inputs
- last longer than 2550 msec. in error-free operation as a result of the particular process
- are greater than the defined short discrepancy time
- are to be differently defined bitwise.
Configure the long discrepancy time individually for each digital input. The 115F operating system
checks the DI bits for discrepancy only once per PLC cycle.
Figure 2-6. Definition of the Long Discrepancy Time
PLC cycle n+2PLC cycle n+1PLC cycle n
Digital input in
subunit A
Digital input in
subunit B
Discrepancy persists
Discrepancy no longer exists
PII
Operating system detects discrepancy
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Discrepancy time
2-8
EWA 4NEB 811 6148-02
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