Modicon Modbus Protocol Reference Guide

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1ModiconModbus ProtocolReference GuidePI MBUS 300 Rev. JDOK-3ModiconModbus ProtocolReference GuidePI MBUS 300 Rev. JJune 1996MODICON, Inc., Industrial Automation SystemsOne High StreetNorth Andover, Massachusetts 01845PI-MBUS 300PrefaceiiiPrefaceThis Guide is written for the person who will use Modicon Modbus protocols andmessages for communication in Modicon programmable controller describes how messages are constructed, and how transactions take placeusing Modbus Guide should be used in conjunction with Modicon user guides for the typesof networks and programmable controllers present in the application. Familiaritywith your network layout, and with your control application, is data and illustrations in this book are not binding.

DOK-3Modicon Modbus Protocol Reference Guide PI–MBUS–300 Rev. J June 1996 MODICON, Inc., Industrial Automation Systems One High …

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