Rockwell Automation 1771-IR , D17716.5.76 RTD INPUT MODULE - Manual (Page 41)

Module Calibration
Chapter 7
7Ć8
You use the values that most nearly add up to the percentage that you
determined in step 8. For example, to attain the value of 0.0597%, you need to
add:
Percentage Bit Number
0.0488281 Bit 05
0.00610351 Bit 02
0.00305175 Bit 01
0.00152587 Bit 00
Total = 0.0595%
As you can see, 0.0595 is smaller than 0.0597, but this value is as close as you
can come using the 7 possible values listed in Table 7.D.
You would enter 10100111 in the lower byte of word 9. This sets bits 05, 02, 01
and 00, which subtracts a gain correction of 0.0595% from the actual input data
value.
Important: When you enter data in the least significant byte, remember to
reenter the data in the most significant byte in the word. If you don’t, the data in
the MSB is lost.
4. Repeat above steps for channels 2 through 6.
5. Apply the values by sending a BTW to the module.
In this chapter, you learned how to calibrate your input module.
Chapter Summary