Rockwell Automation 1794-IT8,D17946.5.7 Thermocouple/Millivolt Input Module - Manual (Page 46)

6–4 Calibrating Your Module
Publication 1794-6.5.7 – April 1997
Flow Chart for Calibration Procedure
Apply reference signal for offset
calibration to each channel to
be calibrated.
Set corresponding bits in the
calibration mask and set cal
Hi/Lo = 0
Set cal–clk =1
Set cal–clk =0
Cal–done = 1
?
NO
YES
NO
YES
Apply reference signal for gain
calibration to each channel to
be calibrated.
Retain corresponding bits in
the calibration mask and set
cal Hi/Lo = 1
Set cal–clk =1
Set cal–clk =0
and
cal hi/lo = 0
NO
YES
NO
YES
Clear corresponding bits in
the calibration mask
BTR
Legend:
Cal–done = 0
?
Cal–done = 0
?
Cal–done = 1
?
BTW
BTW
BTR
BTW
BTW
BTR
BTW
BTR
BTW
BTW
BTR
BTW = block transfer write
= block transfer read
Bad–cal = 0
?
NO
YES
Exit Cal–range = 0
Bad–cal = 0
?
NO
YES
Exit Cal–range = 0