Mitsubishi Electric QJ81DL96 User Manual page 197

7
DATA LOGGING FUNCTION
• After the first trigger occurs, triggers which occur after the number of lines
worth of data after the trigger are sampled, are detected. However, if the
data in the lines after the first trigger overlaps with the data in the lines
before the second trigger, the data at the time output by the first trigger is
not detected with the second trigger. Therefore, the number of lines
before the second trigger may be shortened.
Example Data sampling interval: 10ms
Trigger period: 1500ms
Number of lines before trigger: 100 lines
Number of lines after trigger: 100 lines
MO
Before trigger: 100 lines
1st trigger
2nd trigger
• After the trigger occurs, triggers which occur again within the period up
until the file output completion, are processed only once. Trigger
determination processing is not performed for two triggers in the period
the file is output. Therefore, triggers are not detected which occur after
that (after the third trigger counting from the first trigger). For this period,
since later processing is not in time for the speed of processing data
sampling, a processing overload error occurs. The processing overload
count can be checked with the trigger reoccurrence count in 'data logging
information 1 to 64' ( Section 3.4.11 (5)) in the buffer memory.
The period when data are being saved to a file can be checked with 'data
logging execution information' ( Section 3.4.11 (2)) in the buffer
memory.
For a guide to time required to save data to a file, refer to
( Section 17.1).
Trigger execution
(M0 = ON)
File output processing
1st trigger
2nd trigger
4th trigger
1500ms
Trigger execution (M0 = ON) Trigger execution (M0 = ON)
After trigger: 100 lines
After trigger: 100 lines
Before trigger: 50 lines
Trigger
Trigger execution Trigger execution
(M0 = ON) (M0 = ON)
File output processing
7.3 Logging Types
7.3.2 Trigger logging
(From the previous page)
is not detected.
Trigger execution
(M0 = ON)
File output
processing
7
- 12
1
2
3
4
5
6
7
8