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12.4 Module Change during System Operation
12.4.1 Online module change
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TROUBLESHOOTING
(2) Restrictions on online module change
The following operations cannot be performed during an online module change.
• Issue an online module change request from multiple GX Developers to one CPU
module.
• Write parameters to the CPU module during online module change.
POINT
The following message appears (refer to Diagram 12.19) if an online module
change request is issued from another GX Developer to the CPU module during
online module change.
After confirming the message, select "Yes" or "No".
1. When "Yes" is selected
Online module change operation is switched to "GX Developer 2)" that issued
the request later. (Operation is continued from the pre-switching status.)
2. When "No" is selected
The operation of online module change "GX Developer 2)" requested later is
suspended. (Online module change "GX Developer 1)" executed first is
continued.)
Diagram 12.19 Message screen
Diagram 12.20 Online module change (When "Yes" is selected)
Diagram 12.21 Online module change (When "No" is selected)
GX Developer 2)
Online module
change continued
Online module change
execution canceled
GX Developer 1)
"Yes" selected
GX Developer 2)
Online module
change suspended
Online module change
execution continued
GX Developer 1)
"No" selected
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