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Calling script on PLC communication failure

Created by: WernerHimself at: 7/6/2009 4:00 PM (13 Replies)

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7/6/2009 4:00 PM	Rate (0)
WernerHimself Posts: 17 Rating: (2)	Hi fellow developers, I need a quite simple feature but I cannotfind the solution for it in WinnCC Flex 2008. When the communication between my PLC and my MP377 is lost I'd like to call a script (to display a different screen for example). Does anyone know how to realize this? Thanks in advance.
WernerHimself Posts: 17 Rating: (2)
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7/6/2009 7:31 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (1000)	WernerHimself Hi fellow developers, I need a quite simple feature but I cannotfind the solution for it in WinnCC Flex 2008. When the communication between my PLC and my MP377 is lost I'd like to call a script (to display a different screen for example). Does anyone know how to realize this? Thanks in advance. Hello Werner, Try this way: Inside a script "monitoring", that will be called any few seconds, you set a bit to 0. The PLC will set this Bit in any cyle to 1. If your "monitoring" script is called and the bit is allready "0", than you know that the PLC is not running or the connection is lost.
IBN-Service Posts: 8946 Rating: (1000)
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7/6/2009 9:51 PM	Rate (0)
WernerHimself Posts: 17 Rating: (2)	IBN-Service WernerHimself wrote: Hi fellow developers, I need a quite simple feature but I cannotfind the solution for it in WinnCC Flex 2008. When the communication between my PLC and my MP377 is lost I'd like to call a script (to display a different screen for example). Does anyone know how to realize this? Thanks in advance. Hello Werner, Try this way: Inside a script "monitoring", that will be called any few seconds, you set a bit to 0. The PLC will set this Bit in any cyle to 1. If your "monitoring" script is called and the bit is allready "0", than you know that the PLC is not running or the connection is lost. Hi IBN-Service, Thanks for your reply. I understand the working of the script but what will trigger the calling of the script? Is there a timer or clock in the MP377 that I can call scripts upon? Thanks again.
WernerHimself Posts: 17 Rating: (2)
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7/6/2009 9:58 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (1000)	WernerHimself IBN-Service wrote: WernerHimself wrote: Hi fellow developers, I need a quite simple feature but I cannotfind the solution for it in WinnCC Flex 2008. When the communication between my PLC and my MP377 is lost I'd like to call a script (to display a different screen for example). Does anyone know how to realize this? Thanks in advance. Hello Werner, Try this way: Inside a script "monitoring", that will be called any few seconds, you set a bit to 0. The PLC will set this Bit in any cyle to 1. If your "monitoring" script is called and the bit is allready "0", than you know that the PLC is not running or the connection is lost. Hi IBN-Service, Thanks for your reply. I understand the working of the script but what will trigger the calling of the script? Is there a timer or clock in the MP377 that I can call scripts upon? Thanks again. Yes! Have a look at the "Aufgabenplaner", sorry, I dont know the english word. Wait a moment, I will give you a screenshoot.
IBN-Service Posts: 8946 Rating: (1000)
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7/6/2009 10:04 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (1000)	OK, in the attached screenshot you will find the location of the "Aufgabenplaner" = Scheduler. Also you can use the function "simulate tag" to trigger a script periodically. Attachment Aufgabeplaner.jpg (673 Downloads)
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7/6/2009 10:06 PM	Rate (1)
rit03 Posts: 341 Rating: (24)	Aufgabenplaner is a german word which means "Task Scheduler" regards, rit03
rit03 Posts: 341 Rating: (24)
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This contribution was helpful to 1 thankful Users IBN-Service

7/7/2009 9:03 AM	Rate (0)
IBN-Service Posts: 8946 Rating: (1000)	Hello Werner, here is a fresh link for you: http://support.automation.siemens.com/WW/view/en/35538370 It is for runtime, but it may give you some more ideas! Regards!
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7/7/2009 8:50 PM	Rate (0)
WernerHimself Posts: 17 Rating: (2)	Dear all, Thanks for the information. I have to look in to it. Hope it brings me the answer.
WernerHimself Posts: 17 Rating: (2)
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7/7/2009 8:54 PM	Rate (0)
WernerHimself Posts: 17 Rating: (2)	I'm afraid the scheduler (aufgabeplanner) is not suitable because the fastest time is 1 minute. This means that (worst case) the loss of communication is detected only after one minute. I need a faster response, like 2 seconds or so. I'm going yo investigate your other post. Thanks again.
WernerHimself Posts: 17 Rating: (2)
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7/7/2009 8:59 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (1000)	WernerHimself I'm afraid the scheduler (aufgabeplanner) is not suitable because the fastest time is 1 minute. This means that (worst case) the loss of communication is detected only after one minute. I need a faster response, like 2 seconds or so. I'm going yo investigate your other post. Thanks again. Thats right. For faster monitoring you can use "tag simulation", just have a look at the links above.
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