Siemens SIMATIC S5 Manual page 192
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- Manual (360 pages) ,
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- Operating instructions manual (43 pages)
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S5-115F Manual
The following operating system programs detect errors:
Table 5-6. Error-Detecting Programs of the Operating System
Byte 1*
2
Updating of user locations T0 to T127 and of "long discrepancy times"
(times for 256 digital inputs)
4
Synchronization of user servicing of process (OB2) and time (OB13) interrupts
14
Coordination of the modes in both subunits
16
Comparison of the digital input images (PII) of both subunits and analysis of non-
identical signals
17
Read and exchange analog inputs
18
Comparison of the output images (PIQ) of both subunits
23
Synchronization of SINEC L1 interfaces
25
Copying of the RAM from subunit A to subunit B, since subunit B does not permit PG
operator input
26
RAM comparison of both subunits
27
Bit test of the parallel link
28
Test of the non-intermittent digital I/Os
29
STEP address counter (SAZ) test
Test manager; supports time slice tests of the various hardware components
30
31
Logic gating of error DBs 2 and 3 for subunit A and B
32
Edge-triggered DI matrix test
33
Test of the non-intermittent analog inputs
*
Byte 1 in error record
EWA 4NEB 811 6149-02
Function of the Program Section
Error Diagnostics
5-11
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