Allen-Bradley 1794-IT8, User Manual

Page: 9 / 76

Preface
Publication 1794-6.5.7 – April 1997
Using This Manual
Read this preface to familiarize yourself with this manual and to
learn how to use it properly and efficiently.
We assume that you have previously used an Allen-Bradley
programmable controller, that you are familiar with its features, and
that you are familiar with the terminology we use. If not, read the
user manual for your processor before reading this manual.
In addition, if you are using this module in a DeviceNet system, you
must be familiar with:
•
DeviceNetManager
TM
Software, cat. no. 1787-MGR
•
Microsoft Windows
TM
In this manual, we refer to:
•
the individual thermocouple/mV module as the “module.”
•
the programmable controller as the “controller” or the
“processor.”
The contents of this manual are as follows:
Chapter Title What’s Covered
1
Overview of Flex I/O and Your
Thermocouple/mV Module Describes features, capabilities, and hardware
components.
2
How to Install Your
Thermocouple/mV Input Module
Installation and connecting wiring
3 Module Programming
Block transfer programming and programming
examples
4
Writing Configuration to and Reading
Status from Your Module with a
Remote I/O Adapter Describes block transfer write and block transfer read
configurations, including complete bit/word descriptions.
5
How Communication Takes Place
and I/O Image Table Mapping with
the DeviceNet Adapter Describes communication over the I/O backplane
between the module and the adapter, and how data is
mapped into the image table.
6 Calibrating Your Module
Lists the tools needed, and the methods used to
calibrate the thermocouple input module
Appendix
A Specifications
Module specifications, derating curve, resolution curves
for thermocouples, worst case accuracy and error due
to open circuit current.
B Thermocouple Restrictions Extracted from NBS Monograph 125 (IPTS–68)
Preface Objectives
Audience
Vocabulary
What This Manual
Contains