Precautions - Mitsubishi Electric MELSEC iQ-R Series User Manual

Precautions

The following describes precautions to take when using the data logging function.
• When the AND condition is used, the condition at module start is satisfied only once. Therefore, the trigger occurs at the
first time only even if the trigger count is set to other than 1.
• The judgement of data condition is executed by the collected data in each set collecting interval.
When the data condition is specified to the trigger, data is not detected unless the data condition has been satisfied at
collecting. Set the condition established time longer than the collecting interval.
• If the 2nd operation cycle is not set when the 2nd operation cycle is selected for the collection interval, the status will be
logging error and the data collection will not be executed.
• After the trigger condition is satisfied, if a new trigger occurs during sampling of records after trigger, a new trigger is
ignored. When the sampling of records after trigger is completed and the file is started to be saved, a new trigger is allowed
to be received.
1.
System.LoggingRef[1..10].Md.TriggerStatus[1..32] becomes TRUE when the trigger condition is satisfied. (File 1)
2.
When the trigger condition is satisfied, sampling records after trigger is executed.
3.
The trigger condition occurred during sampling of records after trigger is ignored.
4.
When the file save is executed, System.LoggingRef[1..10].Md.TriggerStatus[1..32] becomes FALSE. (Preparation for the
next logging operation)
5.
System.LoggingRef[1..10].Md.TriggerStatus[1..32] becomes TRUE when the trigger condition is satisfied. (File 2)
Trigger type: OR combine
Trigger condition: Data condition (M0: ↑)
Number of trigger logging: Specify the number of
Saving completed
File save
Saving
request
Unsaved
System.Logging
TRUE
Ref[1..10].Md.
FALSE
TriggerStatus[1..32]
TRUE
Trigger condition
(M0)
FALSE
15 LOGGING
470
15.1 Data Logging/Real-Time Monitor
files to be saved (2 times)
File 1
2.
1.
Sampling recodes before trigger
Sampling recodes after trigger
File 2
4. 2.
3. 5.