Mitsubishi Electric MELSEC iQ-R Series Reference Manual page 26

Positioning module
The pulse output is started at the inter-module synchronization cycle after the positioning start trigger is received. Note that
the pulse output start timing is adjusted only to the inter-module synchronization cycle. After starting, each positioning module
controls the positioning independently.
CPU module
Positioning module No.1 axis 1
Pulse output to an external
source
Axis operation status
Positioning module No.2 axis 4
Pulse output to an external
source
Axis operation status
For details on the positioning module's inter-module synchronization function, refer to the following.
Manual for each positioning module
Simple motion module
For the RD77MS, there is no need to match the inter-module synchronization cycle to the simple motion operation cycle. Note
that the buffer memory value is updated and referred to at the simple motion operation cycle.
■When the inter-module synchronization cycle is faster than the simple motion operation cycle
The monitor data is updated at each simple motion operation cycle, and the control data, etc., is not processed if only the
inter-module synchronization cycle is ON for only one scan, etc.
■When the inter-module synchronization cycle is slower than the simple motion operation
cycle
Data may be skipped if the monitor data changes only during 1 simple motion operation cycle.
For the RD77GF, the inter-module synchronization cycle is equal to the simple motion operation cycle.
For details on the inter-module synchronization function in the simple motion module, refer to the following.
Manual for simple motion module
5 FUNCTION
24
5.1 Fixed Cycle Synchronization Function
Inter-module
synchronization cycle
Inter-module synchronous
interrupt program
Input Operation Output
Normal program
refresh processing refresh
Positioning start
Standby
Standby
Inter-module
synchronization cycle
Inter-module synchronous
interrupt program
Input Operation Output
Normal program
refresh processing refresh
Analyzing
Analyzing
Inter-module
synchronization cycle
Inter-module synchronous
interrupt program
Input Operation Output
Normal program
refresh processing refresh
Start pulse
output.
...
Start pulse
output.
...