Module Configuration; Chapter Objectives; Configuring The Module - Allen-Bradley 1771-IXHR User Manual

High resolution thermocouple/millivolt input module

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Module Configuration

In this chapter you will read how to configure your module's hardware,

condition your inputs and enter your data.

Because of the many analog devices available and the wide variety of possible

configurations, you must configure your module to conform to the analog

device and specific application that you have chosen. Data is conditioned

through a group of data table words that are transferred to the module using a

block transfer write instruction.

You can configure the following features for the 1771–IXHR module:

type of input

one or two input types

X10 magnification for millivolt data

C or

real time sampling

millivolt bias level (zoom mode only)

input filtering

alarming

calibration

Configure your module for its intended operation by means of your

programming terminal and write block transfers.

During normal operation, the processor transfers from 1 to 27 words to the

module when you program a BTW instruction to the module's address. The

BTW file contains configuration words, high and low channel alarm settings,

and calibration values that you enter for each channel. When a block transfer

length of 0 is programmed, the 1771–IXHR will respond with a default

value of 27.

This module is permanently configured to accept and report data in 2's

complementary binary format only. It is not recommended for use with PLC–2

family programmable controllers.

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