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I need to communicate to ABB's AC450, MP200, and AC800 controllers through a redundant Masterbus 300 system. OPC is not an option. Any hints on hardware or software would be appreciated. Even a protocol description would be worth to look at.

Thanks.

I don't have any description about the MB300 but I know there is a card existing (RTA-board for PC's and UNIX stations) which allows you to communicate with the MB300.

hope it helps.

The card you are asking about is the Real Time Accelerator, PU-515A. This card will fit into a PCI slot either 3.2 volts or 5 volts.

It has two AUI 15 pin female plugs to connect to a AUI transceiver and from their to the MB300 bus. We have these in stock.

Submit form at http://www.workstationsexpress.com for complete details. This company also has the DSMB175 memory board for MASTERPIECE controllers at a very nice price of $10,000.00 fully tested and warranted. Hope this helps.

Without focusing on the OPC part of it, please check this link:

http://www.novotek.com/DOWNLOAD/DRIVERS/FACT/MB3%20Fact%2 0Sheet%201.0.pdf

Hope this will help.
Ahmad