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Measuring 1.5-second ON Time
In Figure C, the actual ON time is 1.5 seconds x 2, or 3 seconds. Operation is ON four times when measure-
ments are made, however, so the time is measured as 4 seconds.
Setting the Threshold Value for Total ON Time Using the Network Configurator
Set the Maintenance Counter Mode Choice Parameter and Threshold Maintenance Counter Parameter for
each contact of the safety input group, test output group, and safety output group.
If the Threshold Maintenance Counter is set to 0, the threshold value will not be checked.
7-2 Maintenance Functions of DST1-series Safety I/O Terminals
Reading taken approximately every second.
ON
OFF
1.5 s
Figure C
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