GE Industrial Solutions ASTAT BP - Manual (Page 102)

ASTAT BP User Manual
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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
• 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).