12
TROUBLESHOOTING
12.4 Module Change during System Operation
12.4.1 Online module change
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9
EMC AND LOW
VOLTAGE
DIRECTIVES
10
LOADING AND
INSTALLATION
11
MAINTENANCE AND
INSPECTION
12
TROUBLESHOOTING APPENDICES INDEX
(d) Control status of CPU module
1) An online module change can be executed when a stop error has not occurred.
Whether an online module change can be executed or not depending on the
control status of the CPU module is shown in Table12.14.
* 1: Including the case where a continue error has occurred in the RUN status.
2) An online module change can be continued if the control status of the CPU
module is changed to the STOP/PAUSE status during the online module
change.
In either of the following cases, however, the online module change cannot be
continued.
• When the CPU module is reset
• When a stop error occurs
(e) Number of modules that can be changed online
The number of modules that can be changed online at one time is one for
each CPU module.
Multiple modules cannot be changed simultaneously.
Table12.14 Whether online module change can be executed or not
Control status RUN status*1 STOP status PAUSE status At stop error
Whether online
module change can
be executed or not
Can be executed Can be executed Can be executed
Can’t be
executed
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