Rockwell-automation 1769-IF16V Compact High Density Analog Input Modul Manual do Utilizador descarregar pdf (Página 41)

Publication 1769-UM018A-EN-P - October 2008 41

Module Data, Status, and Channel Configuration Chapter 3

Module update time is calculated by adding up all of the input pair

update times. This table shows the input pair update times when the

lowest filter setting for the input pair is as shown. The table also

shows the module update time assuming all input pairs have at least

one channel enabled and the lowest filter setting is the same for each

input pair.

Input Type/Range Selection

This selection lets you configure each channel individually and

provides the ability to read the configured range selections.

Input Data Selection Formats

This selection configures each channel to present analog data in any

of the following formats.

• Raw/Proportional Data

• Engineering Units

• Scaled-for-PID

• Percent Range

See Valid Input Data

on page 42.

Raw/Proportional Data

The value presented to the controller is proportional to the selected

input and scaled into the maximum data range allowed by the bit

resolution of the A/D converter. For example, the data value range for

a ±10V DC user input is -32,767…32,767, which covers the full-scale

range of -10.5…10.5V.

Filter Setting and Update Times

Filter Setting Update Time per Input

Pair

Update Time per

Module

(1)

(2)

(1) Eight input pairs having at least one channel enabled with the lowest filter setting as shown selected for all.

(2) If you use real-time sampling, the user-configured sample rate is used as the module update time.

16 Hz 200 ms 1600 ms

50 Hz 70 ms 560 ms

60 Hz 60 ms 480 ms

315 Hz 15 ms 120 ms

1365 Hz 5 ms 40 ms

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 83 84

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Rockwell-automation 1769-IF16V Compact High Density Analog Input Modul Manual do Utilizador Página 41