End Processing - Mitsubishi Electric MELSEC iQ-R Series User Manual

END processing

The CPU module performs the following processing.
• Network module link refresh
• Intelligent function module refresh
• Instruction end processing (including dedicated instruction for the module)
• Device latch processing
• Service processing such as read and write of devices, labels, and program access files ( Page 735 Target List and
Operation Details of the Device/Label Access Service Processing Setting)
• Watchdog timer reset ( Page 200 Watchdog timer reset)
• Refresh between CPU modules (for the multiple CPU system configuration)
• Data collection by the data logging function (when the collection interval is set to "Each scanning cycle" or "Sample data at
the next END processing after the specified time has elapsed")
• Self-diagnostics processing
• Sets a value to the special relay/special register (for those with the set timing specified as the END processing timing)
Even during the END processing, an interrupt program, fixed scan execution type program, or event execution
type program (when the trigger type is set to at interrupt occurrence) is executed. To prevent the execution of
an interrupt program during the END processing, disable an interrupt by the DI instruction immediately before
the END processing, and enable an interrupt by the EI instruction at the head of the interrupt program.
8 RUNNING A PROGRAM
8.1 Scan Configuration
8
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