GE Industrial Solutions ASTAT XT User Manual
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Appendix C - DeviceNet™ to Modbus™ Gateway
APPENDIX C - DEVICENET™ TO MODBUS™ GATEWAY
C.1. Introduction
C.1.1.
Overview
This is a description of the different data types that are used in the documentation of the object model. These are
standard definitions of the Open DeviceNet Vendor Association (ODVA).
C.1.2.
Definitions
The following table has a description of all of the data types used.
USINT
Unsigned Short Integer (8-bit)
UINT
Unsigned Integer (16-bit)
UDINT
Unsigned Double Integer (32-bit)
INT Signed
Integer
(16-bit)
STRING Character
String
(1 byte per character)
SHORT
STRINGNN
Character String (1
st
byte is length; up to NN
characters)
BYTE
Bit String (8-bits)
WORD
Bit String (16-bits)
DWORD
Bit String (32-bits)
REAL
IEEE 32-bit Single Precision Floating Point
C.1.3.
Reference Documents
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ODVA Volume 1: CIP Common Specification, Edition 3.2 ©2007 ODVA
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ODVA Volume 3: DeviceNet Adaptation of CIP, Edition 1.4 ©2007 ODVA
C.1.4.
Open DeviceNet Vendor Association, Inc. (ODVA)
ODVA is an independent supplier organization that manages the DeviceNet and EtherNet/IP specification and
supports the worldwide growth of the Common Industrial Protocol (CIP).