Online Module Change - Mitsubishi MELSEC- Q Q12PHCPU User Manual

4 HARDWARE SPECIFICATIONS OF CPU MODULE

4.6 Online Module Change

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Online module change is a function to change the Q Series module mounted on the
main or extension base unit during control of the PLC system.
If a module fails during control, it can be changed to the same type module by using
this function.
POINT
(1) An online module change does not add a module or change it for a module of
another type.
(2) To perform an online module change using a Process CPU in a multiple CPU
system, "Enable online module change for other CPU" must be selected in the
multiple CPU setting dialog box on the PLC parameter screen.
There are restrictions on the versions of the CPU modules that configure a
multiple CPU system. For details, refer to the Process CPU User's Manual
(Function Explanation, Program Fundamentals).
(3) Perform an online module change after making sure that the system outside the
PLC will not malfunction.
(4) It is necessary to turn OFF the external power for the module changed online to
prevent an electric shock or like.
(1) Conditions for performing online module change
An online module change is available under the following conditions.
(a) Online changeable modules
The following table indicates online changeable modules.
Input module
Output module
I/O mixed module
Intelligent
function module
The other modules cannot be changed online.
For whether the above intelligent function modules can be changed online
or not and their changing procedures, refer to the manuals of the intelligent
function modules used.
(b) GX Developer that enables online module change
GX Developer Version 7.10L or later is necessary for online module
change.
An online module change is available from GX Developer via a network.
Module Type
Analog-digital converter module
Digital-analog converter module
Temperature input module
Temperature control module
MELSEC-Q
Restriction
No restrictions
Supported by function
version "C"
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