Rockwell Automation 1771-IR , D17716.5.76 RTD INPUT MODULE - Manual (Page 30)

Module Configuration
Chapter 5
5Ć6
Word Description Bits
1.5 0 1 1 1 1
Word 1 (cont.) 2.0 1 0 1 0 0
2.5 1 1 0 0 1
3.0 1 1 1 1 0
Word 2 If bit 10 is set in word 1, and temperature readings are desired, word
2 must also be used. Enter the exact resistance of 10 ohm RTD at
25 o C in BCD. Range is 9.00 to 11.00 ohms. Values less than 9.00
ohms or greater than 11.00 ohms will default to 10.00 ohms.
Non-BCD values will also default to 10.00 ohms.
Words 3-8 Individual channel bias words entered in BCD. This value is
subtracted from the channel data in the BTR. The bias value is
always a positive number. Bias value range is 0
Words 9-14 Individual channel calibration words.
Word 15 Auto-calibration request word - used to automatically calibrate
selected channels and save the calibration constants in EEPROM.
Bit 00 Offset calibration complete
Bit 01 Gain calibration complete
Bit 02 Save complete
Bit 06 EEPROM fault
Bit 07 Faulty calibration (no save)
Bits 10-15 Channel failed calibration
If zeroes are written to the module in all configuration positions, the module
will default to:
BCD format
100 ohm platinum RTD
temperature in degrees C
real time sampling = inhibited (sample time = 50msec)
In this chapter you learned how to configure your module’s hardware, condition
your inputs and enter your data.
Default Configuration for the
RTD Input Module
Chapter Summary