Table of Contents
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1.
INTRODUCTION ................................................................................................... 1
1.1
Overview ........................................................................................................................................ 1
1.2
Specifications ................................................................................................................................. 2
2.
COMMUNICATION CARD WIRING...................................................................... 3
2.1
Overview ........................................................................................................................................ 3
2.2
Ethernet Port Wiring ...................................................................................................................... 3
2.3
Serial Port Wiring........................................................................................................................... 4
3.
UDA COMMUNICATIONS SETUP ....................................................................... 5
3.1
UDA Ethernet Communications Setup........................................................................................... 5
3.1.1
Overview ............................................................................................................................. 5
3.1.2
Setting up a Static IP Address using the Front Panel .......................................................... 6
3.1.3
Setting up DHCP using the front-panel............................................................................... 8
3.2
UDA Serial Communications Setup............................................................................................... 9
4.
MODBUS RTU SERIAL COMMUNICATION PORT ........................................... 10
4.1
Overview ...................................................................................................................................... 10
4.2
Modbus RTU Message Format .................................................................................................... 10
4.3
Modbus RTU Link Layer ............................................................................................................. 11
4.4
General Modbus RTU message format ........................................................................................ 11
4.5
Modbus RTU Data Layer ............................................................................................................. 11
5.
MODBUS/TCP INTERFACE ............................................................................... 12
5.1
Introduction .................................................................................................................................. 12
5.2
Modbus/TCP Protocol.................................................................................................................. 12
5.3
Parameter Addressing................................................................................................................... 12
6.
IEEE 32-BIT FLOATING POINT REGISTER INFORMATION............................ 13
6.1
IEEE Floating Point Data Format................................................................................................. 13
7.
MODBUS DOUBLE REGISTER FORMAT ......................................................... 16
7.1
Overview ...................................................................................................................................... 16
7.2
IEEE Floating Point Formats........................................................................................................ 17
7.3
Unsigned/signed 32-bit Register Formats .................................................................................... 18
7.4
Setting Up the Modbus Double Register Format ......................................................................... 19
iv
Contents
UDA2182 Communications User Guide
January 09
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