Rockwell Automation 1769-IF16V Compact High Density Analog Input Modules - Manual (Page 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