Rockwell Automation 1756-IF4FXOF2F ControlLogix High-speed Analog I/O Module - Manual (Page 85)

Rockwell Automation Publication 1756-UM005B-EN-P - January 2013 85
Chapter
6
Calibrate the Module
Your ControlLogix high-speed analog I/O module comes from the factory with a
default calibration. Use this chapter to recalibrate your module in the future.
You must add the module to your control program via the Logix Designer
application. Also, if you want to calibrate the module outputs, you must
configure an output range before calibrating the module.
To see how to add a new module to your program, see page 73 .
Topic Page
Differences for Each Channel Type 86
Calibrate Input Channels 87
Calibrate Output Channels 90
IMPORTANT ControlLogix high-speed analog I/O modules allow you to calibrate each
channel individually or in groups, such as all inputs at once. Regardless of
which option you choose, we recommend you calibrate all channels on your
module each time you calibrate. This practice helps you maintain consistent
calibration readings and improve module accuracy.
Calibration is meant to correct any hardware inaccuracies that may be present
on a particular channel. The calibration procedure compares a known standard,
either input signal or recorded output, with the channel’s performance and
then calculates a linear correction factor between the measured and the ideal.
Also, we suggest you plug the module in and let it operate for at least 30
minutes before calibration to allow components to temperature stabilize. The
stability helps prevent temperature drift during operation.