Rockwell-automation 1771-IFF/A,D17716.5.116 FAST ANALOG INPUT MODULE Instrukcja Użytkownika Pobierz pdf (Strona 27)

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Overview of the Fast Analog

Input Module

This chapter, we describe:

• features of the module

• how the module communicates with programmable controllers

The fast analog input module is an intelligent block transfer module

that interfaces analog input signals with any Allen-Bradley

programmable controllers that have block transfer capability. Block

transfer programming moves input data words from the module’s

memory to a designated area in the processor data table in a single

scan. It also moves configuration words from the processor data

table to module memory.

The fast analog input module is a single-slot module and requires no

external power supply. (If using passive transducers for input, the

user must supply loop power.) After scanning the analog inputs, the

input data is converted to a specified data type in a digital format to

be transferred to the processor’s data table on request. The block

transfer mode is disabled until this input scan is complete.

Consequently, the minimum interval between block transfer reads is

the same as the total input update time for each analog input module.

The fast analog input module senses up to 16 single-ended or 8

differential analog inputs and converts them to a proportional

four-digit BCD or twelve-bit binary value. You can select from five

voltage or three current input ranges. Each input can be configured

as a current or voltage input with internal jumpers.

This module’s program selectable features include:

• 16 single-ended or 8 differential inputs

• User program selectable input ranges on a per channel basis (see

table)

• Selectable real-time sampling

• Selectable scaling to engineering units

• Selectable digital filtering

• Selectable data format

• Selectable oversampling

• Selectable channel disable

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Rockwell-automation 1771-IFF/A,D17716.5.116 FAST ANALOG INPUT MODULE Instrukcja Użytkownika Strona 27