Sampling Of Target Data - Mitsubishi Electric MELSEC-L Series User Manual

6.2

Sampling of Target Data

Select a sampling interval and timing from the following items. (
Each scanning cycle
Time specification
Condition
specification
(1) Each scanning cycle
Data are collected in the END processing of each scan.
Scan time
0 END
Program
END processing
(2) Time specification
Specify the time of sampling interval. Data are collected at the specified time intervals. The setting range is as
follows:
• Millisecond: 1 to 32767 (in 1-millisecond units)
• Second: 1 to 86400 (in 1-second units)
*1 In the following cases, scan time will be extended and a watchdog timer error will occur. Pay attention to the sampling
interval and timing or the time spent for one data logging processing.
• Short sampling interval, and many data logging executions per scan
• Large volume of data to be collected, and long data logging processing time
Setting item
Sample data at the first END processing after the specified time
has elapsed
Samples data at the specified time interval.
• When the bit of the bit device rises
• When the bit of the bit device falls
• When the word device value meets
Device specification
the specified value
• When the word device data is
changed
• Always
• When execution condition is ON
Step No. specification • When execution condition is OFF
• When execution condition rises
• When execution condition falls
Scan time Scan time
0 END 0
END processing
Sampling Sampling
*1
CHAPTER 6 DATA LOGGING FUNCTION
Page 99, Section 8.4.4)
Data are collected in the END processing of each
scan.
Specify the time of sampling interval. Data are
collected in the END processing after the specified
time has elapsed.
Specify the time of sampling interval. Data are
collected at the specified time intervals.
Data are collected when the specified device
condition is met in the END processing of each
scan.
Data are collected during execution of the
specified step and when the specified condition is
met.
Scan time
END 0 END
END processing END processing
Sampling Sampling
Description
Scan time
0 END
END processing
Sampling
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