Procedures Before Operation - Mitsubishi Electric MELSEC iQ-R Series User Manual

Procedures before operation

This section describes the points that must be kept in mind about the operation procedure when a redundant system is
configured.
Mounting modules and connecting cables
• Mount the remote head module into the CPU slot and slot No.0 of the main base unit.
• In redundant line, connect the Ethernet cable of system A to remote head No.1 and the Ethernet cable of system B to
remote head No.2.
Setting parameters
Write the same parameters to remote head No.1 and remote head No.2.
When the parameters are write to remote head No.1 only, the parameters are copied automatically by the memory copy
function, however, starting up the remote head module takes some time.
Also, according to the line type set in remote head No.1, the network number and station number of remote head No.2 are
automatically set as follows.
Line type Network number
Single line Same as remote head No.1
Redundant line Same as remote head No.1
• If the model set in a project is different from the model set in the actual remote head module, the actual
system configuration cannot be read for the module configuration of the engineering tool. Write the
parameters to the remote head module, reset or power off and on the module, set the same model to the
project and actual remote head module, and read the configuration again.
• CPU parameters can be set only in remote head No.1. The CPU parameters of remote head No.2 are
automatically set based on the CPU parameters set in remote head No.1. Therefore, CPU parameters do
not need to be written to remote head No.2 using the engineering tool.
Resetting the remote head module
When the remote head module is redundant with redundant slave station, power on the remote head module before powering
on the master station.
If the master station is powered on before the remote head module is powered on, the actual network configuration and the
network map of the CC-Link IE Field Network diagnostics may be a mismatch.
Network diagnostics
Check the communication status of the remote head modules of both systems for CC-Link IE Field Network diagnostics.
In redundant line, even if the CC-Link IE Field Network diagnostics was performed from the control system master station,
only the communication status of the remote head module of the control system can be displayed. To the communication
status of the remote head module of the standby system, change the connection of the engineering tool to the master station
of the standby system and perform the CC-Link IE Field Network diagnostics.
Station number
Station number of remote head No. + 1
Error occurs in the engineering tool when the station number of remote head No.1 is 120
(maximum value).
Same as remote head No.1
1 FUNCTIONS
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1.8 Redundant Function
1