Wonderware
®
ModbusSerial DAServer User’s Guide
Version 2.5
Last Revision: 12/18/06
Wonderware
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Contents 5
ModbusSerial DAServer User’s Guide
Contents
Before You Begin ................................................7
About This Book .................................................................................... 7
CHAPTER 1: Introduction..................................9
Overview ................................................................................................ 9
Generic Modbus Controllers ................................................................ 10
Communications Protocols .................................................................. 10
Application Communications Protocols ............................................11
Bus Communications Protocols........................................................ 12
Accessing Items via the DAServer....................................................... 14
Features ................................................................................................ 16
Demo Mode.......................................................................................... 17
CHAPTER 2: Configuration .............................19
Getting Started Quickly with the DAServer ....................................... 19
Configuring the DAServer ................................................................... 24
ModbusSerial Hierarchy in the DAServer Manager............................ 27
COM_PORT Object ......................................................................... 27
DataMODEM Object........................................................................ 30
RadioMODEM Object...................................................................... 35
PLC Object ....................................................................................... 40
String-Data Handling........................................................................ 56
Message Optimization ...................................................................... 57
Configuring Device Group and Device Item Definitions .................... 57
Device Group Definitions................................................................. 58
Device Item Definitions.................................................................... 59
Scan-Based Message Handling ........................................................ 64
Archiving Configuration Sets........................................................... 65
Hot Configuration ................................................................................ 66
CHAPTER 3: Item Names.................................67
Data and Register Types....................................................................... 67
Modbus Item Naming........................................................................... 69
Register-Number Item Names .......................................................... 69
Item Names Using the Modicon PLC Register Addresses............... 70
Absolute Notation Item Names ........................................................ 71
Modulo-10000 Point Item Names .................................................... 72
Modulo-10000 Items, BCD Register Type, and Concept Data
Structures .......................................................................................... 72
DAServer Standard System Items........................................................ 73
