Series 2000 Communications Handbook - Soliton

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IntroductionSeries 2000 Communications Handbook1. CHAPTER 1 INTRODUCTIONThis chapter describes the scope of this handbook and how to use it.1.1. OVERVIEWThis handbook is written for the people who need to use a digital communications link andMODBUS, JBUS, or EI-BISYNCH communication protocols to supervise Series 2000instruments, including the 2200 and 2400 instrument models.It has been assumed that the reader has some experience of communication protocols and isfamiliar with Series 2000 instruments. The relevant instrument handbook gives a fulldescription 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 digitalcommunications.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 userinterface permissions.Appendix A is a Glossary of Terms.Appendix B lists ASCII codes.No responsibility is accepted for any loss or damage caused by application of the informationcontained in this document.JBUS ® is a registered trademark of APRIL.MODBUS ® is a registered trademark of Gould Inc.1.2. JBUS V MODBUS• MODBUS is a serial communications protocol defined by Gould Inc.April developed JBUS as a special case of MODBUS.• The two protocols use the same message frame format.• The function codes used by Series 2000 instruments are a subset of JBUS andMODBUS function codes.• NB. Series 2000 JBUS addresses are exactly the same as MODBUS addresses.This differs from previous implementations of the protocol in earlier instruments.• In this document reference will be made to MODBUS, however all informationapplies equally to JBUS.1-2 Series 2000 Communications Handbook Part No HA026230 Issue 2.0 Feb-00
Series 2000 Communications HandbookIntroduction1.3. REFERENCESRefer to the documents below for further information;GouldAprilEIA Standard RS-232-CEIA Standard RS-422EIA Standard RS-485MODBUS Protocol Reference Guide, PI-MBUS-300JBUS SpecificationInterface Between Terminal Equipment and Data CommunicationEquipment Employing Serial Binary InterchangeElectrical Characteristics of Balanced Voltage Digital InterfaceCircuitsElectrical Characteristics of Generators and Receivers for use inBalanced Digital Multipoint SystemsSeries 2000 Communications Handbook Part No HA026230 Issue 2.0 Feb-00 1-3
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