Rockwell Automation 1756-OF8I ControlLogix Eight-channel Isolated Analog I/O Modules - Manual (Page 139)

Rockwell Automation Publication 1756-UM540A-EN-P - May 2014 139
Calibrate the ControlLogix Isolated Analog I/O Modules Chapter 8
Calibrate in Program Mode
Your project must be online with the controller to calibrate ControlLogix
isolated analog I/O modules. You can calibrate in the following conditions:
• The controller in Program mode--either Remote Program or Program
mode.
We recommend that your module be in Program mode and not be actively
controlling a process when you calibrate it.
• The controller in Run mode-either Remote Run or Run mode.
In this case, you must inhibit the connection from the controller to the
module being calibrated before beginning the calibration process.
Calibrate the Input Modules Input calibration is a multi-step process. You apply low and high signal references
to the module at different steps in the process.
Calibrate the 1756-IF8I Module
You can calibrate the 1756-IF8I module for use with the following input types:
• Current (mA)
• Voltage (V)
IMPORTANT The module freezes the state of each channel and does not update the
controller with new data until after the calibration ends. This could be
hazardous if active control were attempted during calibration.
Topic Page
Calibrate the 1756-IF8I Module 139
Calibrate the 1756-IRT8I Module 144
IMPORTANT This section shows how to calibrate the 1756-IF8I modules for use with only
voltage inputs.
The calibration process is generally the same if you calibrate the module for use
with current inputs except for the following differences:
• You connect a current calibrator to the module.
• The low reference signal applied to the module = 4 mA.
• The high reference signal applied to the module = 20 mA.