Timing To Synchronize Each Module - Mitsubishi Electric MELSEC iQ-R Series Reference Manual

Timing to synchronize each module

Shows the timing to synchronize each module.
Input module
The input module retrieves the input module at the inter-module synchronization cycle start timing, and holds the input value
during the inter-module synchronization cycle. (The input value is retrieved only once during the inter-module synchronization
cycle.) By reading the input value (input signal) from the inter-module synchronous interrupt program, multiple modules can
read the retrieved value at the same timing.
CPU module
External input signal to X0
X0
External input signal to X1
X1
5 FUNCTION
18
5.1 Fixed Cycle Synchronization Function
Inter-module
synchronization cycle
Inter-module synchronous
interrupt program
Input Operation Output
refresh processing refresh
Read an input value.
ON
ON
ON
ON
Acquire and hold an input value.
ON
ON
Inter-module
synchronization cycle
Inter-module synchronous
interrupt program
Normal program
Input Operation
refresh processing
Read an input value.
OFF
ON
OFF
Acquire and hold an input value.
ON
Normal program
Output
refresh
OFF
Acquire and hold an input value.
ON