Download CFW100 - Modbus RTU Manual

About this Manual
ABOUT THIS MANUAL
This manual supplies the necessary information for the operation of the CFW100 frequency inverter using the
Modbus RTU protocol. This manual must be used together with the CFW100 user manual.
ABBREVIATIONS AND DEFINITIONS
ASCII
CRC
EIA
TIA
RTU
American Standard Code for Information Interchange
Cycling Redundancy Check
Electronic Industries Alliance
Telecommunications Industry Association
Remote Terminal Unit
NUMERICAL REPRESENTATION
Decimal numbers are represented by means of digits without suffix. Hexadecimal numbers are represented with
the letter ‘h’ after the number. Binary numbers are represented with the letter ‘b’ after the number.
DOCUMENTS
The Modbus RTU protocol was developed based on the following specifications and documents:
Document
MODBUS Application Protocol Specification, December
28th 2006.
MODBUS Protocol Reference Guide, June 1996.
MODBUS over Serial Line, December 20th 2006.
Version
V1.1b
Source
MODBUS.ORG
Rev. J
V1.02
MODICON
MODBUS.ORG
In order to obtain this documentation, consult MODBUS.ORG, which is nowadays the organization that keeps,
publishes and updates the information related to the Modbus protocol.
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