Mitsubishi Electric MELSEC iQ-R Series User Manual page 465

■Trigger logging
Min. : Sec. Device value
00 : 00
00 : 01
.
.
Time
01 : 00
01 : 01
.
02 : 15
02 : 16
In trigger logging, the module stores specified data in its internal buffer; 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. Note that data collection is
performed not only at the specified collection interval or timing but also when a trigger condition is met.
[Operating procedure for trigger logging]
1.
Set the logging setting and start logging.
2.
Wait until the trigger condition is met. (The trigger condition status can be checked by
System.LoggingRef[1..10].Md.Trggered and System.LoggingRef[1..10].Md.TrggerStatus[1..32].)
3.
When the trigger condition is met, collect as much data as the number of records specified in the number of records after
trigger and save the collected data to the file.
4.
System.LoggingRef[1..10].Md.SaveStatus changes to "2: Saved" and "3: FullySaved" when the writing of the collected
data to the file is completed.
5.
Data collection is completed when the file is saved at the number of times set in "Number of trigger logging" or
System.LoggingRef[1..10].Cd.StartLog is changed to FALSE.
Number of trigger logging (TRIGGERTIME)
Set the repeat number of trigger logging. A file is saved each time a trigger is executed once.
Number of trigger logging
1 to 32767 (Number of times
specification)
0 (Number of save files
specification)
Number of records (LLNBEFOR, LLNAFTER)
Set the number of records before and after trigger condition occurrence.
Item
Number of records (before trigger)
Number of records (after trigger)
0
1
.
Before
.
Occurrence
61
62
After
.
135
136
Description
Executes repeatedly at the number of specified times.
When exceeding the number of files that specified to the "Number of save files", the setting of "Operation when exceeding
the number of files" will be ignored and "Overwrite" will be operated.
Executes repeatedly according to the "Number of save files" and the "Operation when exceeding the number of files".
When the file save setting (SAVENABLE) is the "Not save", it executes repeatedly without the limit of number of times.
Description
Sets the number of records to be output as pre-trigger record.
Sets the number of records to be logged during and after a trigger occurrence.
SD memory card
Module
Setting range
0 to 999999
1 to 1000000
15 LOGGING
15.1 Data Logging/Real-Time Monitor
15
463