Rockwell Automation 1799-D16U16BAGL 16 Input/16 Output Digital and 2 Input/2Output Analog - Manual (Page 20)

20 16 Input/16 Output Digital and 2 Input/2 Output Analog Embedded I/O Boards
Publication 1799-IN011A-EN-P - February 2007
4. Apply 4.000 mA ±0.5 μA and allow to settle for a minimum of 200 ms.
5. Send the Accept Low Calibration command.
6. Apply 20.00 mA ( ±0.5 μA) and allow to settle for a minimum of 200 ms.
7. Send the Accept High Calibration command.
8. If both samples were successful the module saves data to Dataflash, recalculates
module parameters and exits calibration automatically.
Calibration can be aborted or restarted at any time. Data is not saved until the end of step 7.
TIP
Always apply 4 mA to inputs as low reference when calibrating current
inputs.