Download MELSEC iQ-R Inter-Module Synchronization Function Reference

CC-Link IE Field Network synchronous communication function
When the devices in the CC-Link IE Field Network are communicating, the send side and receive side timing are
synchronized with the inter-module synchronization cycle. The master station parameters must be set to use this function.
(Page 33 Settings in CC-Link IE Field Network)
Master station and local station network synchronous communication
With the CC-Link IE Field Network synchronous communication function, the inter-module synchronization timing for the
system in the master station is sent to the local station via the network. The local station sends the inter-module
synchronization cycle timing to each module in its own station.
Inter-module
synchronization cycle
Inter-module synchronous interrupt program
CPU module No.1
Input
refresh
Operation
processing
Output
refresh
Inter-module
synchronization cycle
Inter-module synchronous interrupt program
Normal program
Input
refresh
Operation
processing
Output
refresh
Normal program
5
System of
the master station
Master station
Link scan
Link scan
Local station
Link scan
Link scan
1 Transfer the inter-module synchronization timing.
System of
the local station
Inter-module synchronous interrupt program
Output
refresh
Inter-module synchronous interrupt program
Input
refresh
Input module
Input
Input
Output
Output
Output module
Operation
processing
Normal program
CPU module No.2
Inter-module
synchronization cycle
Input
refresh
Operation
processing
Output
refresh
Normal program
Inter-module
synchronization cycle
When the local station is cut off from the master station because of a cable break, etc., synchronization cannot
be maintained between the master station and local station. Thus, the inter-module synchronization target
modules in the local station also cannot be synchronized.
5 FUNCTION
5.1 Fixed Cycle Synchronization Function
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