Technical data

RS485 and RS232 Adapter Installation and Start-up Guide iii
Table of Contents
Safety Instructions
Overview ...................................................................................................... i
Warnings ...................................................................................................... i
Chapter 1 –Introduction
Overview .................................................................................................. 1-1
Delivery Check ......................................................................................... 1-1
How to Use This Guide ............................................................................ 1-1
Chapter 2 – Installation
Mounting .................................................................................................. 2-2
Connectors and Switches ........................................................................ 2-3
Selecting the Communication Speed ....................................................... 2-4
Selecting RS485 or RS232 Mode ............................................................ 2-5
RS485 Bus Termination ........................................................................... 2-5
Installation to RS485 Bus......................................................................... 2-6
Installation to RS232 Bus......................................................................... 2-8
Earthing and Termination ....................................................................... 2-11
Chapter 3 – Programming
General .................................................................................................... 3-1
Communication Settings .......................................................................... 3-2
Control Locations ..................................................................................... 3-5
Diagnostic Counters ................................................................................. 3-6
Chapter 4 – Communication
Introduction to Modbus............................................................................. 4-1
Register Read and Write.......................................................................... 4-1
Register Mapping ..................................................................................... 4-2
Exception Codes ...................................................................................... 4-3
Function Codes ........................................................................................ 4-4
The Control Word and the Status Word ................................................... 4-4