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dualmal

Tag Data Monitor Tool - Connection Failed

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I am trying to use the Tag Data Monitor Tool to create views for the different tags on my 1756-L73. When I try to connect (with the remote name the same as the Path that I use in RSLogix), and select "RSLinx OPC Server" as my OPC server and click connect I get the error window shown in the screenshot (http://i.imgur.com/JoCDvPo.png). I've done quite the extensive googlefu on anything containing the error "funConnectServer" and can find zero information as to why that would be happening. Am I missing something obvious? Any help is greatly appreciated. Thanks!

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In RSLinx, did you right-click on the PLC processor you want to tag monitor and create an OPC Topic? I believe one has to declare an OPC topic in order to create the OPC Server instance.

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Yes, all of those items in the left pane are OPC topics in RSLinx. They all point to the PLC processor I'm trying to tag monitor. Just for kicks I created a new one, didn't work. As a note, I did just walk into this environment about 2 weeks ago with no background and no documentation. So I am flying a little blind.

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In a Logix Adv Prog class some years ago, a nifty tool they used was Excel scripting to read and write values to the PLC. At the time, I thought this could be a useful tool in troubleshooting connectivity issues such as this. I remember the scripting using a DDEPoke command. This link is very similar to the class lab exercise. http://www.plcdev.com/connecting_controllogix_excel Let's backup and get the specifics...PLC firmware version, Logix version, Linx version & Linx model (i.e., OEM, Professional, etc.). This may help to flush out the root-cause. Also, does your development PC have a firewall? You may want to try disabling for a brief spell as this may be interrupting the OPC data server or OPC data client. Edited by kaiser_will

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1756-L73 ControlLogix - Revision 19.14 RSLogix 5000 Professional - Version 19.01.00 (CPR 9 SR 3) RSLinx Classic - Version 2.59.01 CPR 9 SR 5 - or - - Version 3.60.00 CPR 9 SR 6 I've got two lines running, each with their own development PC's but matching PLC hardware. Hence the difference in RSLinx versions. I've checked and this issue occurs in both environments. I had the same idea about the firewall, no such luck.

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So I did some digging around my facility and found out we have a TechConnect contract, that no one seemed to know about. They were able to solve the issue. Turns out, as long as RSLinx is running locally and there is an OPC topic anywhere in view of the PC running the Tag Data Monitor the "Remote Name" field needs to be left as "<Local>" and that does the trick.

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