Siemens SIMATIC S5-95F - Page 421

Error Diagnosis and Elimination S5-95F
Table 15-2. Evaluating System Events in DB254 (continued)
Error No.
(Decimal)
Primary
Information
Auxiliary
Information
Corrective
Measures
13 Error in user program
(detected during program scan)
(Error response: Soft STOP)
(Error response: Error reported
when byte 2 contains 71
H)
)
Byte 2:
73
H
: Illegal operation in user
program
74
H
: Range violation in DO
DW/DI FW
75
H
: OB2 or OB3 takes too
long to execute
71
H
: Interrupts disabled too
long
Byte 3:
When
byte 2 contains 71
H
or75
H
0: Cause in OB2
1: Cause in OB3
2: Error caused by IA/RA
operation (see 8.2.8)
Evaluate ISTACK
Check program
20 Memory submodule defective
(Error response: Hard STOP)
Replace memory
submodule
21 Subunits contain different
memory submodules
(Error response: Hard STOP)
Always use memory
submodules with same
Order No. in both subunits
22 Illegal memory submodule
type
(Error response: Hard STOP)
Use only correct memory
submodules (Chapter 2)
23 Memory submodules have
wrong system ID
(Error response: Hard STOP)
Use submodules with right
system ID
24 Memory submodules replaced
(Error response: Hard STOP)
Never replace memory
submodules while PLC is in
RUN mode
Insert memory submodule
with different contents only
after overall reset
25 Subunits have different user
programs
(Error response: Soft STOP)
Insert memory submodules
with identical user programs
26 User program has incorrect
signature
(Error response: Soft STOP)
Give user program new
signature
Replace memory
submodule
Replace basic unit
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15-14 EWA 4NEB 812 6210-02