Communications Handbook
Contents
SERIES 2000
MODBUS AND EI-BISYNCH DIGITAL COMMUNICATIONS HANDBOOK
Contents Chapter 1 Chapter 2 INTRODUCTION ……………………………………………………..…………… ………………………..……..…… DIGITAL COMMUNICATIONS HARDWARE
RS232, RS422, RS485 Transmission Standards Cable Selection Earthing Wiring General Wiring RS232 Wiring RS422 or 4-wire RS485 Wiring 2-wire RS485 Wiring RS422 and RS485 Controllers Connections for up to 63 controllers Large RS422/485 Networks KD485 and 261 Connections
Page 1-1 2-1
2-1 2-2 2-3 2-3 2-3 2-4 2-5 2-6 2-7 2-8 2-9
Chapter 3 Chapter 4 Chapter 5
MODBUS PROTOCOL EI-BISYNCH PROTOCOL
Getting Started
……………………………….………………………… ………………………….………………..………… ……………………………………
3-1 4-1 5-1
5-2 5-2 5-12 5-16 5-31 5-33
MODBUS AND EI-BISYNCH ADDRESSES
Modbus and Bisynch Parameter Tables Status Words Configuration Mode Parameters Ramp/Dwell Programmer Data - Modbus Ramp/Dwell Programmer Data - Bisynch
Chapter 6 Appendix A Appendix B Appendix C
ADVANCED TOPICS GLOSSARY OF TERMS ASCII CODES
………………………………………………….......... ……………………….……………………………..…. ...........................................................
6-1 A-1 B-1 C-1
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EUROTHERM OFFICE ADDRESSES
"This product is covered by one or more of the following US Patents: 5,484,206; Additional patents pending. PDSIO and INSTANT ACCURACY are trademarks of Eurotherm."
HA 026230
Issue 1.1 Oct-98.
Applies to 2200 and 2400 Series Controllers
i
Communications Handbook
Introduction
CHAPTER 1
INTRODUCTION
This chapter describes the scope of this handbook and how to use it.
OVERVIEW
This handbook is written for the people who need to use a digital communications link and MODBUS, JBUS, or EIBISYNCH communication protocols to supervise Eurotherm Controls Series 2000 instruments, including the 2200 and 2400 instrument models. It has been assumed that the reader has some experience of communication protocols and is familiar with Series 2000 instruments. The relevant instrument handbook gives a full description of how to use the instruments, configuration options and definition of parameters. Chapter 2 of this document is a guide to cabling and the basic physical environment of digital communications. Chapter 3 is a general description of the MODBUS and JBUS protocols. Chapter 4 is a general description of the EI-BISYNCH protocol. Chapter 5 lists Series 2000 parameter addresses and mnemonics. Chapter 6 covers advanced topics such as access to full resolution floating point data and user interface permissions. Appendix A is a Glossary of Terms. Appendix B lists ASCII codes. Eurotherm Controls accepts no responsibility for any loss or damage caused by application of the information contained in this document. JBUS is a registered trademark of APRIL. MODBUS is a registered trademark of Gould Inc.

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