19 DATA LOGGING FUNCTION
19.2 Data Collection Conditions
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19
Condition specification
This option lets the user set the data collection timing by specifying the device data conditions. Collects data when the
monitored data meets the specified condition during the END processing.
To collect data continuously while the conditions are met
The following conditional formula causes the data logging function to collect data continuously while the conditions are met:
• =: When the current value of the monitored data is equal to the comparison value
• : When the current value of the monitored data is not equal to the comparison value
• ≥: When the current value of the monitored data is equal to or larger than the comparison value
• >: When the current value of the monitored data is larger than the comparison value
• ≤: When the current value of the monitored data is equal to or smaller than the comparison value
• <: When the current value of the monitored data is smaller than the comparison value
(1) During the END processing, the data logging function does not collect data because the conditions are not met.
To collect data only when the state changes
The following conditional formula causes the data logging function to collect data only during the END processing for the
scans where the conditional formula is met. It does not collect data for any single scan where the conditional formula is not
met during the END processing (even if the conditional formula is met before the END processing is initiated).
• ↑: When the specified data turns from off to on
• ↓: When the specified data turns from on to off
• At change: When the current value of the specified data changes
(1) The data logging function does not collect data because there has been no change in state since the last scan.
END processing END processing END processing END processing END processing
END0 END0 END0 END0 END0Program
Sampling Sampling
1 scan
(1)
Set value ≠ Current value Set value = Current value Set value ≠ Current value
Word
device value
END processing END processing END processing END processing END processing
END0 END0 END0 END0 END0Program
Sampling Sampling
1 scan
(1)
Set value = 0 (initial value) Set value = 1 Set value = 2
Word
device value
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