Rockwell Automation 1771-IL/B , D17716.5.91 ISOLATED ANALOG INPUT Module - Manual (Page 45)

Module Calibration
Chapter 6
6-5
Save Calibration Values
If any ”uncalibrated channel” bits 08-15 (10-17 octal) of word 15 are set, a save
cannot occur. Auto-calibration should be performed again, starting with offset
calibration. If the module has a faulty channel, the remaining functioning
channels can be calibrated by inhibiting calibration on the faulty channel.
The module can be run with the new calibration values, but will lose them on
power down. To save these values, proceed as follows:
1. Request a “save to EEPROM” by setting bit 02 in BTW word 37 and
sending the BTW to the module. Refer to Table 6.A.
2. Queue BTRs to monitor for “save complete”, “EEPROM fault” and
“calibration fault.” An EEPROM fault indicates a nonoperative EEPROM;
a calibration fault indicates at least one channel was not properly offset or
gain calibrated and a save did not occur.
In this chapter, you learned how to calibrate your input module. Chapter Summary