Mitsubishi Electric MELSEC iQ-R Series - Chapter 18 Monitor Function

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18 MONITOR FUNCTION
18 MONITOR FUNCTION
This chapter describes the functions for checking the CPU module operation.
In a redundant system with redundant extension base unit, if systems are switched while the monitoring/test
function is being used on the modules on the extension base units, the following operations are performed.
• If monitoring is performed during system switching, an error occurs.
• If the new standby system is connected after system switching, monitoring stops or a fixed value (FFFFH(-
1)) is displayed.
Item Description Reference
Circuit monitor Checks the status of the running program on the program editor. GX Works3 Operating Manual
Device/buffer memory batch monitor Checks the current values of the device and buffer memory in a batch.
Watch Registers a device and label and checks the current values.
Program monitor list Checks the processing time of the running program.
Interrupt program monitor list Checks the number of executions of the interrupt program used in the
program.