Transcription of Industrial Communications and Control Protocols
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Industrial Communications and Control Protocols
PDHonline Course E497 (3 PDH) Industrial Communications and Control Protocols By Michael J. Hamill, Copyright 2016 Updated 2019 PDH Online | PDH Center 5272 Meadows Estate Drive Fairfax, VA. 22030-6658 Phone: 703-988-0088 An Approved Continuing Education Provider PDHonline Course E497 Hamill, Industrial Communications and Control Protocols 2 Index Introduction 3 Protocol: A definition 3 Digital Data Basics 3 Differences in Controller Types 5 Diversity in the PLC/DCS/PAC market and its problems 5 Networks, Nodes, and Topologies 7 The OSI Model and its importance 11 Hardware and Connecting Cables 12 Communication methods 14 Deterministic Communications 15 Interface standards and devices 16 Common Features in Protocols 18 Some Notable Automation Companies 19 Proprietary and Open Protocols 20 The HART protocol 20 TCP/IP 21 Control Protocols 22 Modbus and some of its variants 23
systems for control equipment end users. As time passed, technology improved. Processor speeds increased, sizes of components used by controller OEMS - processors, memory modules, etc. - decreased, and new products could be offered 1 Typically the voltage across a 250 ohm resistor built into each analog input module channel
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