Mitsubishi Electric MELSEC iQ-R Series User Manual page 85

Network synchronous communication with multiple cycles
When device stations with different communication cycles are included in the network, cyclic transmission between stations is
performed according to the communication cycle. For the cyclic transmission of the master station and a general station
remote station, data can be transmitted to other stations after two cycles.
The following figure shows the cyclic transmission timing when "Communication Period Setting" in "Network Configuration
Settings" is set to "Normal-Speed".
Normal speed
Cycle 4/4
Inter-module
synchronization cycle
Inter-module synchronous
interrupt program
CPU module
Input Operation Output
refresh processing refresh
System
of the
master
station
Network
module
(master station)
Output module
(normal speed)
(2)Buffer memory OFF
(Cycle 1/4)
(1)
ON
(3)Buffer memory
(Cycle 4/4)
(1) The communication cycle timing can be checked with the communication cycle information of following buffer memories.
• When using the PLCopen Motion control FB mode:Un\G1277440 to Un\G1277441
• When using the Simple Motion mode:Un\G2877440 to Un\G2877441
The timing of data refreshed in the CPU module can also be checked with this buffer memory area. The 0th bit in this buffer memory area is turned on
during the first (1/4) cycle for normal speed. In addition, the 15th bit in this buffer memory area is turned on during the last (4/4) cycle for normal speed.
(Page 220 Communication cycle timing)
(2) First 1/4 cycle buffer memory is as follows.
• When using the PLCopen Motion control FB mode:Un\G1277440.0
• When using the Simple Motion mode:Un\G287740.0
(3) Final 4/4 cycle buffer memory is as follows.
• When using the PLCopen Motion control FB mode:Un\G1277440.F
• When using the Simple Motion mode:Un\G287740.F
To perform network synchronous communication when multiple cycles coexist, set the setting of the local
station to "Basic Period" for "Communication Period Setting" in "Network Configuration Settings".
Cycle 1/4 Cycle 2/4
Inter-module Inter-module
synchronization cycle synchronization cycle
Inter-module synchronous Inter-module synchronous
interrupt program interrupt program
Input Operation Output Input Operation Output
refresh processing refresh refresh processing refresh
Output refresh
Cyclic transmission
Cyclic transmission
Cyclic transmission
OFF
ON
OFF
OFF
1.6 CC-Link IE TSN Network Synchronous Communication Function
Normal speed
Cycle 3/4 Cycle 4/4
Inter-module Inter-module
synchronization cycle synchronization cycle
Inter-module synchronous Inter-module synchronous
interrupt program interrupt program
Input Operation Output Input Operation
refresh processing refresh refresh processing
ON
Normal speed
Cycle 1/4
Inter-module
synchronization cycle
Inter-module synchronous
interrupt program
Output Input Operation Output
refresh refresh processing refresh
Output value setting
ON
ON
OFF
OFF
1 FUNCTIONS
1
83