8/21/2011 11:36 PM | |
Joined: 7/28/2010 Last visit: 3/18/2024 Posts: 184 Rating: (11) |
Hi Goce, In your WinCC Flexible Project, under Communication\Connection there is a tab called "Area Pointer". Under the "Area Pointer", select "Coordination". There are 3 bits in the "Coordination". One of them is called "Life Bit" which flashes every second. You can check the bit in PLC and if it is not flashing more than 2 or 3 seconds, you can generate an alarm. The device panel generates an alarm too if it loses its connection to PLC. Regards, Behnam www.winccflexiblemastery.com |
This contribution was helpful to4 thankful Users |
8/22/2011 3:19 PM | |
Joined: 9/28/2005 Last visit: 3/12/2024 Posts: 2957 Rating: (242)
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Hello, If you do like Behnam R told you then you will detect comm lost in 2-3 seconds. Isn't it ok for you. If you look further into TCP/IP protocol then you will see that it is unable to detect that communication is lost. There is allways good idea to use life bit when we talk about TCP/IP. Even if you use this protocol on PC with your own program, still you can't detect commlost by integrated functions. Driver don't know even if you disconnect ethernet cable. So please use life bit. |
Best regards, |
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3/8/2016 2:38 AM | |
Joined: 1/22/2011 Last visit: 6/23/2022 Posts: 43 Rating: (0) |
Life bit maybe will be the solution. |
5/7/2018 4:24 AM | |
Posts: 1 Rating: (0) |
Hi In this reply Behnam quotes "The device panel generates an alarm too if it loses its connection to PLC." I have a few follow up questions Where is this alarm generated? Is there a way that this can be driven to the alarming so that it can be displayed on the alarm page? Basically, Im looking for a way that the HMI can detect that the connection to the PLC is lost within the HMI only. Ie show the the PLC is stopped
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5/7/2018 6:17 AM | |
Joined: 7/5/2013 Last visit: 4/26/2024 Posts: 3076 Rating: (505) |
Hello Brad, see https://support.industry.siemens.com/cs/ww/en/view/35538370 You can use the WinCC flexible system alarms 140001 (disconnected) and 140000 (connected). Regards, Frink |
Pi is exactly three! |
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