Rockwell-automation 1769-IF16V Compact High Density Analog Input Modul Manuale Utente Scaricare il pdf (Pagina 39)

Publication 1769-UM018A-EN-P - October 2008 39

Module Data, Status, and Channel Configuration Chapter 3

Enable/Disable Channel (EC)

This configuration selection lets each channel be enabled individually.

Input Filter Selection

The input filter selection field lets you select the filter frequency for

each channel. The filter frequency affects the noise rejection

characteristics, channel step response, and module update time, as

explained below.

Noise Rejection

The modules use a digital filter that provides noise rejection for the

input signals. The filter is programmable, allowing you to select from

five filter frequencies for each channel. A lower frequency (60 Hz

versus 315 Hz) can provide better noise rejection but it increases

channel update time.

Normal Mode Rejection is better than 50 dB at 50 and 60 Hz, with the

50 and 60 Hz filters selected, respectively. Transducer power supply

noise, transducer circuit noise, or process variable irregularities may

also be sources of normal mode noise.

1769-IF16V Module: Bit Definitions for Input Range and Input Data Configuration Words

Define To Choose Make these bit settings

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

Input

Range

Select

-10…+10V

0000

0…5V

0001

0…10V

0010

1…5V

0011

Input

Data

Format

Select

Proportional Counts

000

Engineering Units 001

Scaled for PID 010

Percent Range 011

TIP

When a channel is not enabled (0), no voltage or

current reading is provided to the controller by the

A/D converter.

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Rockwell-automation 1769-IF16V Compact High Density Analog Input Modul Manuale Utente Pagina 39

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