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Processing of an inter-module synchronous interrupt program (I44)
The following shows the processing of an inter-module synchronous interrupt program (I44).
■Input refresh (CC-Link IE Field Network module)
At the input refresh, link devices (RX, RWr) are refreshed from the CC-Link IE Field Network module to be synchronized.
■Operation processing
• To import the input signal (X) and the input from the buffer memory, use the C Controller module dedicated functions
(CCPU_X_In_Word_ISR, CCPU_FromBuf_ISR).
• To import the output signal (Y) and the output to the buffer memory, use the C Controller module dedicated functions
(CCPU_Y_Out_Word_ISR, CCPU_ToBuf_ISR).
■Output refresh (CC-Link IE Field Network module)
In the output refresh, link devices (RY, RWw) are refreshed to the CC-Link IE Field Network module to be synchronized.
Refresh timing
The following shows the refresh timing depending on the operating status of a C Controller module.
■Operation in the STOP state (RUN to STOP)
• C Controller module turns OFF the output when it is in the STOP state due to user operation (such as user program or
switch operation). Refresh is performed continuously during the STOP state.
• A C Controller module turns the output OFF and also stops the refresh when a stop error which is caused by any failure of
the C Controller module or any other modules occurred.
The inter-module synchronous interrupt program (I44) does not stop even if C Controller module is in the
STOP state.
Precautions
When the system parameter of the inter-module synchronization function is rewritten while the C Controller module is in the
STOP state, it will not applied by switching to the RUN state, and the C Controller module operates with the parameter before
the rewrite.
4 BASIC FUNCTIONS
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4.7 Inter-module Synchronization Function
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