Error Diagnosis and Elimination S5-95F
15.3.2 Standard FB and Signature
You, as user, may never modify standard function blocks. In order to make sure that they remain
unchanged, each standard FB has a signature.
The S5-95F enters the signatures of the first 16 standard FBs loaded into data words DW 2 to DW
33 of DB 254. You can check the identity of these FBs on the basis of these entries.
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Data Word Loaded Standard FB
DW 2
DW 3
Block number of the first FB loaded
Signature of the first FB loaded
DW 4
DW 5
Block number of the second FB loaded
Signature
:
:
:
DW 32
DW 33
Block number of the sixteenth FB loaded
Signature
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An overall reset deletes all entries in data words DW 2 to DW 33.
15.3.3 Information on System Responses
The operating system enters the system response variants which occurred following an overall reset
in DR 34 (the low-order, or righthand, byte of data word DW 34). The entry corresponds to an
ORing of "byte 0" of all error blocks (refer to section 15.3.9).
Flag
Hard STOP
Soft STOP
Response for a signal group as per the DB1 parameters
Error locations detected to date
Error in subunit B
Error in subunit A
4 3 1 0 System response to date27 6 5
First Data Byte (Byte 34)
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15-4
EWA 4NEB 812 6210-02
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