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12.4 Module Change during System Operation
12.4.1 Online module change
12
TROUBLESHOOTING
(4) Online module change procedure
The following explains the online module change procedure of the I/O module.
For the online module change procedure of the intelligent function module, refer to the
manual of the used intelligent function module.
POINT
1. It is recommended to turn OFF the output (Y) from the output module/hybrid I/
O module to be changed online before it is changed.
2. When making an online module change for the Redundant CPU, specify "No
settings have been made (Default)", "System A" or "System B" as the target
system in the "transfer setup" by GX Developer.
Do not specify the "Control system" or "Standby system" as the target system.
If the "Control system" or "Standby system" is specified in the transfer setup,
the following error dialog (refer to Diagram 12.23) appears at execution of an
online module change.
When the following error dialog is displayed, change the target system to "No
settings have been made (Default)", "System A" or "System B", and then
perform an online module change.
3. When executing online module change for the module mounted on the
extension base unit in the Redundant CPU, access cannot be made to a
module mounted on the extension base unit from the standby system. Set
[Transfer setup] in GX Developer, checking that the trasnfer target Redundant
CPU module is the control system.
Diagram 12.23 Error dialog box
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