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Download - OMEGA Engineering
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MAN0313-04 CH. 2 2.19 17 SEP 2002 PAGE 89 Miscellaneous Elements Miscellaneous Elements include Comments and the Vertical Branch. 2.19.1 Comments Comments allow entering descriptive text into the program. Comments can be downloaded to the controller. Comments do not affect the run time of the program, but they can reduce the available memory in the controller if downloaded. a. Add Vertical Branch To insert a Vertical Continuation, click on the Vertical Branch tool. cursor. Note the change in the mouse Move the mouse cursor to the location where the Vertical Branch is designed, the single click the mouse. b. Delete Vertical Branch To delete a Vertical Branch, click on the Vertical Branch tool. Move the mouse cursor over the continuation to be removed. When the cursor indicates a pencil eraser, single click the mouse. Warning: Removing a Vertical Branch can cause elements to be disconnected. Repair those flaws before downloading the program. EXAMPLE The following code can be used as a safety interlock. Note the use of the Vertical Branch bars to provide the logical OR handling of the three switches. %I01 is a normally open manually activated switch. %I02 and %I03 represent safety interlock switches that generate a logic HIGH when their associated door is CLOSED. Vertical Branch Thus, pressing E-stop OR opening Front_Door OR opening Back_Door generates the stop bit.
