
Or are you keeping the old 315-2DP, and need to hook it up with another new PLC that forwards the information to the new Citect ? What a great site with lots of contributors with excellent knowledge and only too willing to assist. Thank yo all so far - I do not often have to ask but this time I certainly do. I will come back with more information and probably more questions. I will have a look when on site on Wednesday and Thursday and try to determine how Citect is set up. It operates in conjunction with two other dishes of the same size in the US and Spain. It is a radio telescope site, the biggest dish in the southern hemisphere. The job is indirectly for NASA and is operated by the CSIRO here for NASA.

The generators are used for power failure, soft transfer and peak lopping. There are also 8 generators 60hz, 4 2400VAC and 4 480VAC coupled by transformers. The client wishes to have the information from the Siemens PLC available site wide as it is on a motor gen set that converts 2400VAC 50hz to 2400VAC 60hz and the whole site runs on the motor gen set. Eventually the new SCADA will go site wide and there are already 3 web managers hooked into the new SCADA server. The other requirement is that the new Citect uses the excellent tab style pages.

The client wants the whole lot to be consolidated into the new PLC system as the old SCADA conputer has had it. The other PLC system will be doing what it has to do with respect to reading and writing with the Siemens PLC and the new Citect SCADA is hooked into a network of new PLCs. It is an old version of Citect and I doubt it would be using OPC - more likely a direct driver.
