Operating Procedure For Trigger Logging - Mitsubishi Electric MELSEC iQ-R Series User Manual

Operating procedure for trigger logging

In trigger logging, the CPU module stores specified data in its internal buffer at a specified collection interval or timing; it
extracts a specified number of data records before and after the satisfaction of a trigger condition and saves the extracted
data in a data logging file residing in the storage memory. Note that data collection is performed not only at the specified
collection interval or timing but also when a trigger condition is met. In addition, once a trigger condition is met, any
subsequent trigger conditions are ignored.
1.
Write the settings into data memory or SD memory card using CPU Module Logging Configuration Tool.
2.
Instruct CPU Module Logging Configuration Tool to start data logging. The data logging settings are registered and
trigger logging begins. (The special relay (data logging start) turns on.)
In redundant mode, if the systems are switched while trigger logging is being executed, logging data collected
in the old control system is discarded.
3.
Wait until the trigger condition is met. (Trigger standby)
4.
The data specified in CPU Module Logging Configuration Tool is collected. (Trigger condition met)
5.
Data collection is completed by collecting as much data as the number of records specified in CPU Module Logging
Configuration Tool and writing the collected data into the storage memory.
6.
Specify the desired file in the storage memory to read the results of data logging.
20 DATA LOGGING FUNCTION
20.5 Logging Type
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