Rockwell Automation 1769-OF4VI Compact I/O Isolated Analog Modules - Manual (Page 48)

Publication 1769-UM014B-EN-P - May 2010
3-10 Module Data, Status, and Channel Configuration for the Input Module
Input Data Selection Formats
This selection configures channels 0 to 3 to present analog data in any of the
following formats.
 Raw/Proportional Data
 Engineering Units
 Scaled-for-PID
 Percent Range
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 and filter selected. The full range for a ±10V dc user input is -32767
to +32767.
See Valid Input Data on page 3-11.
Engineering Units
The module scales the analog input data to the actual current or voltage values
for the selected input range. The resolution of the engineering units is
dependent on the range selected and the filter selected.
See Valid Input Data on page 3-11.
Scaled-for-PID
The value presented to the controller is a signed integer with zero representing
the lower user range and 16383 representing the upper user range.
Allen-Bradley controllers, such as the MicroLogix 1500, use this range in their
PID equations. The amount over and under user range (full scale range -410 to
16793) is also included.
See Valid Input Data on page 3-11.
Percent Range
The input data is presented as a percentage of the user range. For example, 0V
to 10V dc equals 0% to 100%.
See Valid Input Data on page 3-11.