Cc-Link Ie Field Network Synchronous Communication Function - Mitsubishi Electric MELSEC iQ-R Series Reference Manual

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 37 Settings in CC-Link IE Field Network)
The CC-Link IE Field Network synchronous communication function cannot be used with a redundant system
station.
When the system is powered off and on or the CPU module or the remote head module on the local station is
reset and set in RUN state, if these modules cannot receive the synchronous signal from the master station,
they become a waiting state for synchronization.
These modules cannot perform the CC-Link IE Field Network communications or communications with
external devices until they receive the synchronous signal from the master station or the waiting state for
synchronization times out because they are in the initial processing state during these periods.
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.
CPU module No.1
System of
the master station
Master station
Local station
System of
CPU module No.2
the local station
Input module
Output module
Inter-module
synchronization cycle
Inter-module synchronous interrupt program
Input Operation Output Normal program
refresh processing refresh
Link scan
Link scan
1 Transfer the inter-module synchronization timing.
Inter-module synchronous interrupt program
Normal program
Input Operation Output
refresh processing refresh
Input
Output
Inter-module
synchronization cycle
Inter-module
synchronization cycle
Inter-module synchronous interrupt program
Input Operation Output Normal program
refresh processing refresh
Link scan
Link scan
Inter-module synchronous interrupt program
Input Operation Output
Normal program
refresh processing refresh
Input
Output
Inter-module
synchronization cycle
5.1 Fixed Cycle Synchronization Function
5
5 FUNCTION
31