Inter-Module Synchronous Master - Mitsubishi Electric MELSEC iQ-R Series Reference Manual

Inter-module synchronous master

The inter-module synchronous master is a module that issues the inter-module synchronization command. Normally, the CPU
module becomes the inter-module synchronous master. (For the multiple CPU system configuration, the CPU module on the
extreme left, for which "Use" is set in "Use Inter-module Synchronization Function in System" of "Inter-module
Synchronization Setting", becomes the inter-module synchronous master.) Note that if a module on the local station or a
remote head module is used as the synchronization target, the inter-module synchronous master is as follows because the
CC-Link IE Field Network module on the local station and the remote head module operate by receiving the command from
the master station.
• When a module on the local station is used as the synchronization target: The network module becomes the inter-module
synchronous master.
• When a remote head module is used as the synchronization target: The remote head module becomes the inter-module
synchronous master.
Normally, the CPU module becomes
the inter-module synchronous master
and issues the inter-module
synchronization command.
Local station
Inter-module synchronization command
On the local station, the Network module receives
the command from the master station, and issues
the inter-module synchronization command as
the inter-module synchronous master.
Inter-module synchronization command
Master station
Slave station
The Network module sends
the inter-module synchronization
command to each station.
Inter-module synchronization command
Slave station
2 SYSTEM CONFIGURATION
2.1 Precautions for System Configuration
2
9