Rockwell Automation 1794-IF4I, -OF4I, IF2XOF2I, -IF4IXT, -IF4ICFXT, -OF4IXT, IF2XOF2IXT FLEX I/O Isolated Analog Modules - Manual (Page 132)

Publication 1794-6.5.8 - January 2010
130 Calibrating Your Module
Final Gain Calibration for Current Inputs
After performing a gain calibration and an offset calibration:
1. Enter a new gain correction calculated as follows into the
respective output words:
new gain_corr = gain_corr – ( 2 x offset_corr )
2. Send a block transfer write with the CK bit set to 1. With GO
high, the module will copy “gain_corr” coefficients (signed 2’s
complement format) from the data words into gain storage for
the selected channels. If RV is high, default values will be copied
to all channels.
3. Send a block transfer write with CK set to 0. With GO high, the
previously determined gain coefficients are stored into EEPROM
as directed by the channel selection.
4. Clear the IC bit to 0. Gain calibration is terminated.