russedwards Posted July 26, 2012 Report Share Posted July 26, 2012 Hello Again I need a final piece of help regarding Positive Transition Contacts. The problem I am having is this: I would like a single pulse upon loading an HMI / Sub Rouine that will activate a positive trans. contact. This in turn starts my test prodedure. I can activate this stage of the procudre manually with a tap of a push button, but I need to do this step automaitically. The problem I am having is that when I set the contacts, they remain pressed ON and I cannot reset it. IS it possible to add an automatic, single pulse when loading an HMI? I hope this is clear and thank you to everyone who has helped me out so far. It has been a very steep learning curve! Quote Link to comment Share on other sites More sharing options...
Emil Posted July 26, 2012 Report Share Posted July 26, 2012 Which controloler you're using? In Vision, you have tool HMI Loaded. When a display is loaded, defined bit is active. You can use positive transition of this bit in your aplication. In Jazz/M91, you can make compare If SI2 (curent display) = N, where N is the number of your display. Result will be coil of MB. Then again you can use -|P|- contact of this bit to activate your logic. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.