Siemens SIMATIC S5 Manual page 303

S5-115F Manual
Error Con-
Error Message Text
Identi- sec.
fier No.
Progr.
51 04
PL not functioning:
CPU error
Additional info. 1:
Page No.
Additional info. 2:
Page access type
Additional info. 3:
No. of program causing error
51 05
PL not functioning:
CPU, PL or IM error
Additional info. 1:
Page No.
Additional info. 2:
Page access type
Additional info. 3:
Semaphore register
Additional info. 4:
No. of program causing error
EWA 4NEB 811 6149-02
Possible Cause
Error group No. 13
Page is not assignable due to wrong
access identifier:
- CPU error
Error group No. 23
Page has been unassignable for too
long due to wrong previous assign-
ment (r-, w-):
- CPU error
- PL error
- IM304/IM324 connection
interrupted
PLC Error Messages
Remedy
- Replace CPU
- Service
Warm restart:
1. POWER OFF/ON
2. Stop/Run
At first occurrence:
OVERALL RESET.
If error has not been removed
after several OVERALL RESETs:
- Replace CPU
- Replace PL
- Check connection
Warm restart:
1. POWER OFF/ON
2. Stop/Run
B-43