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opened before and closed after every transmission. For efficiency, it is
recommended to enable “Cache Connections”.
e) Click “OK” to close the MSG Configuration dialog. At this stage,
MainRoutine should look like Figure 100.
Figure 100: MainRoutine
5) Assign a tag to the XIO element.
a) Double-click on the XIO element located to the left of the MSG block. In the
drop-down box, double-click on the “connection.EN” field. Refer to Figure
101. This configuration causes the MSG instruction to automatically
retrigger itself when it completes. While this is acceptable for the purposes
of this example, it can produce high network utilization. In actual practice, it
may be desirable to incorporate additional logic elements to allow triggering
the MSG instruction at a specific rate or under specific conditions.
Figure 101: Configure XIO Element
6) The program is now complete. Refer to Figure 102.