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I/O
Applications
201
6
6.1.4 Keeping Last Toggle Status
This feature can memorize the current output state when the monitoring is stopped or the system is
restarted. For example, if the output device is a light, the triggered light will remain ON when you stop
monitoring.
Setting up “Keep Last Toggle Status”
In the I/O Device dialog box (Figure 6-1), select N/O Toggle or N/C Toggle, and click the Arrow button
on the right to select
Keep Last Toggle Status.
Figure 6-6
Application Example
The following two illustrations explain how the input works with the output set to Keep Last Toggle
Status
.
1. Input (N/O) + Output (N/O Toggle + Keep Last Toggle Status)
The triggered output remains ON even when you stop monitoring or restart the system.
Input
Output
N/O N/O N/O
N/C N/C
N/C
1st Input Trigger 2nd Input Trigger
Stop monitoring /
Restart the system
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