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WinCC checks if connection to PLC is OK?

Created by: Baka94 at: 3/1/2013 1:42 PM (8 Replies)

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3/1/2013 1:42 PM	Rate (0)
Baka94 Posts: 9 Rating: (0)	Is it possible to make WinCC to check if to connection to PLC is OK? I need to make this so the people who use the WinCC program knows if the connection to PLC is OK (Rectangle changing color i.e.). I haven't found any working way so far (not even from internet). Another way could be that WinCC restores tags to default valuse if it can't get the new ones (currentlythe tagskeep the latest data they recieve).
Baka94 Posts: 9 Rating: (0)
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3/1/2013 2:27 PM	Rate (0)
Marcjan Diamond Member Joined: 4/22/2010 Last visit: 3/31/2025 Posts: 5697 Rating: (716)	_{something went wrong here}
	Last edited by: Marcjan at: 3/1/2013 5:20 PM Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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3/1/2013 2:28 PM	Rate (0)
Marcjan Diamond Member Joined: 4/22/2010 Last visit: 3/31/2025 Posts: 5697 Rating: (716)	Hello, Just type "wincc connection status" in the searchfield and i''m sure you will find some solutions: Like this: connection status Regards, Marcjan
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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3/1/2013 4:52 PM	Rate (0)
hdhosseini Diamond Member Joined: 1/28/2009 Last visit: 1/5/2026 Posts: 6892 Rating: (1368)	Baka94 Is it possible to make WinCC to check if to connection to PLC is OK? I need to make this so the people who use the WinCC program knows if the connection to PLC is OK (Rectangle changing color i.e.). I haven't found any working way so far (not even from internet). Another way could be that WinCC restores tags to default valuse if it can't get the new ones (currentlythe tagskeep the latest data they recieve). Hello , I suggest some solutions, they are fast to achieve: 1-Send a pulse with a noticeable on-off time for user and put it as a property in background color of a object such as a circle or a rectangle.If color is fix, there is problem. 2-Check the pulse in WINCC for being ON or OFF for longer time than allowable value and generate alarm in that case. Check the following for an idea: Connection Fault Between PLC and Wincc Best regards Hamid Hosseini
	Demo Channel on Youtube
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3/5/2013 2:05 PM	Rate (0)
Baka94 Posts: 9 Rating: (0)	Got it working now :) WinCC just detects the connection begin lost after 10 seconds or something close to that. Is there a way to make it detect it faster?
Baka94 Posts: 9 Rating: (0)
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3/5/2013 3:04 PM	Rate (0)
hdhosseini Diamond Member Joined: 1/28/2009 Last visit: 1/5/2026 Posts: 6892 Rating: (1368)	Baka94 Got it working now :) WinCC just detects the connection begin lost after 10 seconds or something close to that. Is there a way to make it detect it faster? Hello, I guess by checking a pulse from PLC, you can detect that less than 10 seconds, but I have not tried that. What method you are using currently? Best regards Hamid Hosseini
	Demo Channel on Youtube
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3/5/2013 6:07 PM	Rate (0)
umencho Grandmaster Joined: 3/21/2006 Last visit: 1/8/2026 Posts: 10247 Rating: (1183)	Lifeline bit in WinCC

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3/6/2013 9:51 AM	Rate (1)
Yolov Silver Member Joined: 2/22/2006 Last visit: 11/29/2025 Posts: 291 Rating: (37)	Hi, mate This bit transfers to figure out if there is communication with PLC always makes me laugh. This reminds me when I was involved in InTouch SCADA project. WinCC has integrated communication check. This are GetTagState function. You just need to use the following script. just put it into Global C Action. I adapt it from my project: ================================================================= // WINCC:TAGNAME_SECTION_START // syntax: #define TagNameInAction "DMTagName" #define TAG_COMM_CHECK "external tag name here" #define TAG_COMM_NOTIFY "tag name to create event in alarm Logging - BOOL!" // next TagID : 1 // WINCC:TAGNAME_SECTION_END // WINCC:PICNAME_SECTION_START // syntax: #define PicNameInAction "PictureName" // next PicID : 1 // WINCC:PICNAME_SECTION_END BOOL bRes = FALSE; WORD wClockMemory = 0; DWORD dwState = 0; wClockMemory = GetTagWordState(TAG_COMM_CHECK, &dwState); //Return-Type: BYTE if(( 0x0001 \| // No connection to partner established 0x0002 \| // Protocol error 0x0004 \| // Network component defect 0x0080 \| // Conversion error 0x0400 \| // Addressing error in channel 0x2000 \| // Timeout, no response from channel 0x4000 ) // Server not available & dwState) { // we have comm problem bRes = SetTagBit(TAG_COMM_NOTIFY,TRUE); //Return-Type: BOOL //printf("THERE IS NO COMM WITH PLC. dwState = %04X.\r\n", dwState); } else { // we don't have comm problem bRes = SetTagBit(TAG_COMM_NOTIFY,FALSE); //Return-Type: BOOL //printf("Comm is OK with PLC. dwState = %04X.\r\n", dwState); } ================================================================= I hope it help you. regards, Svetozar Yolov

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This contribution was helpful to 2 thankful Users umencho mmhamunkar

3/6/2013 12:19 PM	Rate (0)
umencho Grandmaster Joined: 3/21/2006 Last visit: 1/8/2026 Posts: 10247 Rating: (1183)	Yolov Hi, mate This bit transfers to figure out if there is communication with PLC always makes me laugh. This reminds me when I was involved in InTouch SCADA project. ... Svetozar Yolov Most probably because Intouch doesn't have these kind of function. There you must prepare the 'watchdog script'. Do you have an example concerning Intouch? Best regards, Hristo Mihalev

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