Using Modbus TCP & Modbus RTU in an IEC 61131 Programming Environment
Modbus is the de facto standard when it comes to industrial connectivity in a multi-manufacturer automation environment. Modbus is an address-based protocol based on a traditional PLC. But with IEC-61131, register addresses are a foreign concept as IEC 61131 is strictly variable-based. What gives? In this session we’ll not only talk about how to implement Modbus with IEC 61131 – we’ll demonstrate it for you as well using the Horner OCS All-in-one Controller!
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Table of Contents:
00:00 - Intro
01:13 - Agenda
02:25- Quick Modbus Review
04:29 - Horner Modbus Server Implementation
06:47- Standard vs. Enhanced IEC
12:30 - Using Modbus with Standard IEC
16:59 - Demo - Modbus in Standard IEC
18:21 - Cscape Demo #1
21:48 - PC
22:55 - Using Modbus with Enhanced IEC
25:47 - Enabling the Ethernet Version
27:12 - Mapping Variables
29:02 - Demo - Modbus in Enhanced IEC
30:50 - Cscape Demo #2
40:57 - Closing