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"No connection to the PLC"

10/2/2007 10:42 AM	Rate (0)
winston Posts: 4 Rating: (0)	I have a tag set to read from a PLC via TCP/IP however currently, when I run, the IO Field is greyed out and hovering over the tag in WinCC reveals the message "No connection to the PLC" (although it also says Quality:8.) Despite this the IP address, rack number and slot number all appear to be correct and I can view the Datablock in question via Step7. I am baffled as to how to proceed although I'm sure the solution must be a simple one. Any suggestion would be appreciated.
winston Posts: 4 Rating: (0)
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10/2/2007 11:06 AM	Rate (0)
rit03 Silver Member Joined: 6/13/2006 Last visit: 2/11/2023 Posts: 341 Rating: (24)	Have you downloaded the hardware config to PC (i.e to CP Card) ? Please check that.

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10/2/2007 1:44 PM	Rate (0)
Danielle Posts: 1275 Rating: (123)	Hi, Also.. make sure that ALL memory areas accessed by WinCC have been declared in Step 7... if WinCC tries to access a position in a DB which doesn't exist in Step7 you can get connection errors... Also... run the application under APDIAG, to check for errors, and post your logs here. Best regards, Danielle
Danielle Posts: 1275 Rating: (123)
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10/3/2007 10:29 AM	Rate (0)
Ikkezelf Posts: 1084 Rating: (72)	Check rack and slot number again to be sure it are the correct ones.
Ikkezelf Posts: 1084 Rating: (72)
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3/12/2014 2:39 PM	Rate (0)
CS Moderator Moderator Joined: 9/1/2005 Last visit: 11/19/2024 Posts: 4114 Rating: (195)	follow up question published by Navaneeth_Nis split to a seperate thread with the subject after re-installed WINCC V7.0 SP2 TAG problem Best regards CS Moderator
	My Forum is the place to personalize your profile, track your topics, and maintain content that interests you. Best regards CS Moderator
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