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Functions
8.2 Time stamping the input signals with IM 153-2
ET 200M
140
Operating Instructions, 12/2008, EWA-4NEB780600602-08
8.2.2.4
Time stamping in the redundant system
The IM 153-2 supports the function time stamping even in the redundant system S7-400H.
Time stamping of signal changes in an S7-400H
Both IM 153-2 save the messages of the time-stamped signals. This way, after a changeover
process from active to passive IM 153-2 the "new" active IM 153-2 prepares the current
messages for further processing.
Note
During the changeover between the two IM 153-2 the signal changes are not time stamped.
This time is communicated by the special message "Changeover with redundant BEGIN /
END".
You will find more information on time stamping in redundant systems in the "PCS 7
documentation (
http://support.automation.siemens.com/WW/view/en/10806846/130000
)"
documentation.
7
7
1
2
3
4
4
5
6
①
WinCC Operator station (OS) for unit visualization
②
Industrial Ethernet
③
Time master (SICLOCK)
④
ET 200M distributed I/O with 2 x IM 153-2
⑤
redundant DP master system
⑥
S7-400H automation system
⑦
Optional: RS 485 repeater
Figure 8-7
Example structure with 2 x IM 153-2 for redundancy in an H system
Содержание IM 153-4 PN
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Страница 254: ...Order Numbers for the ET 200M ET 200M 252 Operating Instructions 12 2008 EWA 4NEB780600602 08 ...
Страница 268: ...Glossary ET 200M 266 Operating Instructions 12 2008 EWA 4NEB780600602 08 ...