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How to troubleshoot Modbus communication problem between DCS / SCADA and third party devices.?

SCADA
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Question added by Ali Kandil , Head of Trading devision , ISCO Trading and contracting
Date Posted: 2015/07/24
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Karam Soliman
by Karam Soliman , Electrical Project Manager , Power System and Information Tech.

-For hardware problems ,You need RS-232 break-out boxes, RS-232 to  RS-485 converters, continuity testers, voltmeters to trace the signal between master(DCS/SCADA) and slaves(third party devices)

-If it was not a hardware problem you should use a Protocol Analyzer to check for software problems.

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