Chapter 1 Overview - Mitsubishi Electric MELSEC iQ-R Series Manual

1
OVERVIEW
The online module change function allows users to replace the module mounted on a main base unit or an extension base
unit with a new module controlling the system while the power is on (online).
The online module change function allows users to replace the module that malfunctioned during control with a module having
the same model as that of the malfunctioning module.
Select one of the following methods to use the online module change function.
• Changing a module using special relays and special registers
• Changing a module directly
Changing a module using special relays and special registers
Replace the target module with a new one by operating special relays and special registers of the control CPU from an
external device (such as a GOT). Controls can be started and stopped at the desired timing.
GOT
 Operate special relays and special registers from an engineering tool, a GOT, or an external device for operation.
 Remove the replacement target module.
 Mount a new module.
For details, refer to the following.
Page 29 Changing a Module by Controlling Special Relays and Special Registers
1 OVERVIEW
6
SCADA
Ethernet
Ò
Engineering tool
(Device test, monitor)
External device
Ó
for operation
Program for SM/SD
operation
Ô