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S7400R and OP177B communication problem

12/5/2007 7:27 AM	Rate (0)
DIPESH Posts: 5 Rating: (0)	Hello, I am using S7400R (software redundancy) with OP177B (6AV66420DA011AX0). WinCC Flex version 5 is used to program the OP177B.Problem is that the I/O fields showvalues and #### periodically instead of continuous display. The OP system error messages indicate that the communication makes and breaks.The error code it gives is 0x80000104. I have checked the OP177B manuals could not find any details for this error.Has someone had a similar problem or know about the error code.
DIPESH Posts: 5 Rating: (0)
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12/6/2007 1:03 PM	Rate (0)
The Brain Posts: 1611 Rating: (121)	Hi, i think you have to check your Profibus/MPI wire and connector-plug. Be shure that all resistor at the connector-plug are correct adjusted. regards,
The Brain Posts: 1611 Rating: (121)
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12/10/2007 8:26 PM	Rate (0)
bunglehead Posts: 54 Rating: (3)	You should check the bus speed too, max. speed is constrainted by phisical length of your wires
bunglehead Posts: 54 Rating: (3)
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