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2/7/2012 7:25 AM | |
Joined: 7/19/2011 Last visit: 7/17/2024 Posts: 4 Rating: (0) |
Hi, I am have a strange problem using WinCC V7.0as OPC Client with Rosemount Saab TankMaster OPC Server. The connectivity is established correctly and using OPC Item Manager I setup all the tags required to be read from OPC server. However, once the communication is started, after a while WinCC (the opc client) starts writing back to the OPC server. As a result of that the values on the OPC Server (TankMaster) become yellow (i.e. Manual Entry). Note: This is proved by the fact that only those values in TankMaster become yellow which WinCC is reading. The other values (which are not configured to be read by WinCC opc client)on TankMaster side are OK and keep updating. I tried to contact Service Request but they simply told me that it is not possible in WinCC to establish just a "Read Only" connection. Our customer contacted Rosemount (opc server vendor)to check with them if they can prevent writing back of values in TankMaster OPC server by wincc. They are saying that it is possible but very costly to re-configure. Previously we were using Siemens Sinaut CS7 Scada system(Product by I&S)as OPC Client andwe did not have any such problem with the same TankMaster configuration. After upgrading to PCS 7 (with WinCC V7.0) we started having problem. I would like to know if someone had experience in connecting to Saab TankMaster system via OPC? I am attaching the snapshot of my OPC channel driver settings. Can someone tell me what is the meaning of the highlighted paramters in the Channel & Tagproperties? Attachmentrtg.zip (124 Downloads) |
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