Mitsubishi Electric MELSEC iQ-R Series User Manual page 127

Condition match send
■Transmission of monitoring results
For device monitoring, the monitoring conditions registered by the user (conditions for sending monitoring results), the
monitoring condition values and the monitoring information read from the CPU module are compared. The monitoring results
are transmitted when there is a block where the monitoring conditions match.
For programmable controller CPU status monitoring, the monitoring results are transmitted only once when an error is
detected for the first time from the status information read from the CPU module. (This corresponds to the edge triggered
transmission described below.)
■Edge triggered/level triggered transmission
Two transmission methods of the monitoring results are available for the condition match send for device monitoring: edge
triggered transmission and level triggered transmission.
• Edge triggered transmission
The monitoring conditions registered by the user (conditions for transmitting monitoring results), the monitoring condition
values and the monitoring information read from the CPU module are compared. Then, the monitoring results are
transmitted only once when a satisfaction of the monitoring conditions is detected for the first time.
After that, when the monitoring information read from the CPU module does not match the monitoring conditions and then it
matches the monitoring conditions once again, the monitoring results are transmitted.
• Level triggered transmission
The monitoring conditions registered by the user (conditions for transmitting monitoring results), the monitoring condition
values and the monitoring information read from the CPU module are compared. While the monitoring conditions are
satisfied, the monitoring results are transmitted at each cycle time.
(Timing to transmit data)
Condition agreement
transmission
Cycle time
Program
(conditions matched/not matched)
Matched
Not matched
END
6 USING THE PROGRAMMABLE CONTROLLER CPU MONITORING FUNCTION
Monitoring information
One-block
One-block
portion portion
Matched
END END
6.2 Programmable Controller CPU Monitoring Function
6
Target device
125