Restrictions On Replacement Procedures - Mitsubishi Electric MELSEC iQ-R Series Manual

3.2

Restrictions on Replacement Procedures

• When a module is removed directly while a module dedicated instruction is active, the completion status of the module
dedicated instruction does not become Completed with an error.
• Replace one module at a time. Do not replace any other module during online module change. Doing so does not
guarantee the operation of the mounted module. To recover from this, power off the programmable controller and replace
the module.
• When performing online module change in the multiple CPU system, replace one module at a time in the entire multiple
CPU system. Performing online module change on multiple modules simultaneously is not possible. Doing so does not
guarantee the operation of the mounted module. To recover from this, power off the programmable controller and replace
the module.
• During online module change, writing the system parameter, CPU parameter, and module parameter is not possible. Doing
so causes an online module change error (error code: 4202H).
• Avoid online module change while parameters are being written. The online module change may not be completed
successfully. This condition does not guarantee the operation of the mounted module.
• While the remote head module is being changed online, the standby system remote head module cannot be reset or
mounted. Reset or mount the module after the online module change is completed.
3 REPLACEMENT PROCEDURE
3.2 Restrictions on Replacement Procedures
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