Mitsubishi Electric MELSEC IQ-R series Reference Manual page 84

Specification of read timing by monitor condition
The read timing can be changed by specifying monitor conditions according to the selection of subcommand.
■When do not specify monitor condition
Data is read by the END processing after a read request.
Timer 0 monitoring time
Command message
External device side
Module side
Program
■When monitor condition is specified
Data is read by the END processing after the specified monitor conditions are satisfied.
Timer 0 monitoring time
External
Command message
device side
Module side
Program
Monitoring with multiple conditions to the device memory of the same CPU module cannot be performed at
the same time. When this command, to which a monitor condition is specified, is executed while monitor with
other conditions is being performed, the command is completed abnormally.
8 DEVICE ACCESS
82
8.1 Data to be Specified in Commands
Timer 1 monitoring time
Data
Read request
END processing
Sequence scan
Timer 1 monitoring time
Read request
END processing Timing when the condition is met
Sequence scan
Timer 2 monitoring time
Response message
Timer 2 monitoring time
Response message
Data