Structure Of Bytes 16 To 19 In Diagnostic Message; Structure Of Diagnostic Data, Bytes 20 And 21 - Siemens SIMATIC Distributed I/O System DP/ASi Link Manual

Diagnostics and Error Handling
8.2.7 Second Station Diagnosis with the IM308C
Area
The second part of the station diagnostics is contained in bytes 16 to 25.
Contents
The contents of bytes 16 to 19 are shown in Table 8-14.
Table 8-14
Byte
Diagnostic data
The second part of the station diagnostic data of the DP/ASi link, which refer
Part 2
to the ASi, are spread over two areas. In the first area, as shown in
Table 8-15, you will find ASi-related data. A message is indicated by a "1".
Table 8-15

Structure of diagnostic data, bytes 20 and 21

1
Byte Meaning
20.1 ASi power supply
20.4 Automatic programming is
possible.
21.0 Configuration error:
Unconfigured ASi slaves pre-
sent
1
Unnamed bits are without significance.
8-18

Structure of bytes 16 to 19 in diagnostic message

Con
tents
16 0A Second station diagnostics with 10 bytes including header.
H
The second station diagnostics covers bytes 16 to 25.
17 xx This area has been prepared for an extended diagnosis from your S7.
H
18 04 Reserved
H
19 00 Reserved
H
Reason/Reaction
ASi power supply has failed.
Precisely one ASi slave has failed
(refer to sec tion 7.3).
The address of the failed ASi slave
is indicated by five ASi SLAVE
FAIL LEDs.
On start-up:
Data exchange cannot take place
on PROFIBUS-DP side.
In operation:
Data exchange is possible.
Contents
Remedy
Check the ASi power supply.
Check the connections of the ASi.
Replace the failed ASi slave with a
new ASi slave having identical I/O
and ID codes.
Remove unconfigured ASi slaves.
Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b