12/3/2010 12:32 PM | |
Joined: 10/7/2005 Last visit: 9/23/2024 Posts: 3022 Rating: (1054) |
You're giving up to fast dear @Nick "Direct keys"are a feature that's available to Key Panels as well as Touch Panels and you can use up to 40 "Touch Buttons" as "Direct keys" with the MP277. Have another look at the previously linked manualand make sure to pay heedto the applicable restrictions when using "Direct keys" on a Touch Panel. Just as an afterthought: You currently do have a touch button on the MP which is used to start and stop the conveyor correct? Assuming you can live with the restrictions on Touch Panel related "Direct keys", you can keep the whole applicationneat and simple by doing the following: Change the existing Start/Stop Touch button to a direct key and then use itsProfinet Input instead of the DB or M bit that you are currently using in your logic. If comms now fail, the Input goes off and the conveyor stops. I hope this helps |
Last edited by: fritz at: 12/3/2010 12:44 PMadded afterthought Cheers |
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12/16/2010 12:09 PM | |
Joined: 11/17/2010 Last visit: 11/25/2020 Posts: 81 Rating: (2) |
Hello Fritz, In your latest post you told me about the direct keys. I have added the direct keys but for the connection check the direct keys are not the right solution. Because the direct keys can only be used under a [BUTTON] with the function [PRESS], the result is that a input (for example I2.0) in the CPU becomes high when you are pressing the button. So when the connection falls, you won't notice it. Because the CPU thinks you aren't pressing it anymore. But i have found an other solution in this document that you earlier mentioned: https://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo&lang=en&objid=18797552&caller=view The area pointer " coordination" provides a life bit to the CPU. The bit continous toggles. With this bit i am able to check my connection at any time! Thank you for your help! Greets Nick |
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