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CHAPTER 14 MODULE CHANGE DURING SYSTEM OPERATION
14
14.1 Online Module Change
(d) Control status of CPU module
A module can be changed online when a stop error does not occur.
The following table describes whether a module can be changed online or not depending on the control status
of the CPU module.
*1 Including the case where a continue error has occurred in the RUN status.
An online module change can be continued even when the CPU module is set to the STOP or PAUSE status
during the operation. In either of the following cases, however, 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.
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 Cannot be executed
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