Siemens SIMATIC S5 Manual page 338

PLC Error Messages
Error Con-
Error Message Text
Identi- sec.
fier No.
Progr.
250 11
Analog value out of window
range, discrepancy time-out
E.g.
Additional info. 1:
AI word No.
Additional info. 2:
CH AQ word No.
Additional info. 3:
CH DQ word No.
B-78
Possible Cause
Error group No. 09
I/O module comparison individual
error
Error group No. 08
I/O error burst
(only in the case of CPU 942-7UF13
with I/O ETV 3 or 4)
- Two-channel sensors
* 1 sensor defective
* AI module defective
* Window too small
* Discrepancy time too short
* Sensors respond at different
instants (max. difference >
discrepancy time)
- Single-channel sensor
* AI module defective
* Window too small
* Discrepancy time too short
Decimal display
CH AQ word No. with subunit
identifier, decimal display;
CH DQ word No. with subunit
identifier, decimal display
S5-115F Manual
Remedy
* Replace sensors
* Replace module
* Configure larger window
* Increase discrepancy time
* Synchronize sensor response
(Difference discrepancy time)
* Replace module
* Configure larger window
* Increase discrepancy time
Warm restart in the case of
individual errors in signal group
No. 0 (Stop mode):
1. Stop/Run
Warm restart in the case of
individual errors in signal group
No. 1 to 28
(passivation):
a) Test mode:
1. POWER OFF/ON
2. Stop/Run
b) Safety mode:
1. OVERALL RESET
Warm restart in the case of error
burst:
1. POWER OFF/ON
2. Stop/Run
This does not cancel passivation.
To do so, see above: warm restart
in the case of passivation.
EWA 4NEB 811 6149-02