Appendix C - Devicenet™ To Modbus™ Gateway; Introduction; Overview; Definitions - GE ASTAT XT QT 0008U Series User Manual

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
UINT
UDINT
INT
STRING
SHORT
STRINGNN
BYTE
WORD
DWORD
REAL
C.1.3. Reference Documents
• ODVA Volume 1: CIP Common Specification, Edition 3.2 ©2007 ODVA
• 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).
• Appendix C - DeviceNet™ to Modbus™ Gateway
108
Unsigned Short Integer (8-bit)
Unsigned Integer (16-bit)
Unsigned Double Integer (32-bit)
Signed Integer (16-bit)
Character String (1 byte per character)
Character String (1
st
characters)
Bit String (8-bits)
Bit String (16-bits)
Bit String (32-bits)
IEEE 32-bit Single Precision Floating Point
byte is length; up to NN