Device Memory Monitor; Monitoring Procedure - Mitsubishi Electric MELSEC IQ-R series Reference Manual

8.5

Device Memory Monitor

Read the registered device data, and monitor it.

Monitoring procedure

The following shows the procedure to monitor devices.
1.
Registration of monitor device
Register a device to be read. (Page 121 Register monitor data (command: 0801))
2.
Execution of monitor
Read values from a registered device. (Page 122 Monitor (command: 0802))
3.
Registration of monitor devices
Reregister a device when a device to be read is changed. (Page 121 Register monitor data (command: 0801))
• Monitoring with multiple conditions to the device memory of the same CPU module cannot be performed at
the same time. If monitor (command: 0802) is executed while monitor with other conditions is being
performed, the command is completed abnormally.
• Register devices to be read with the 'register monitor data' (command: 0801) before executing the 'monitor'
(command: 0802). If the 'monitor' (command: 0802) is executed without the registration, the command is
completed abnormally.
• When the access target module is restarted, the registered content is deleted. Register the devices to be
read again with the 'register monitor data' (command: 0801).
8 DEVICE ACCESS
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8.5 Device Memory Monitor