Rockwell Automation 1771-IR Series D RTD Input Module User Manual - Manual (Page 33)

4–5 Configuring Your RTD Module
Publication 1771Ć6.5.129 - March 2000
Word Description Bits
Word 1 Cont. Ohms 1 0
Not used 1 1
bit 08 (10) In temperature mode:
0 = Entire module is platinum
1 = Entire module is 10 ohm copper. Enter exact value in word 2.
In ohms mode:
0 = 30mohm/count resolution
1 = 10mohm/count resolution
bits 09-10
(11-12)
Data format bits tell module which format to use for reporting input
values to processsor
Format
Bits 12 11
4-digit BCD 0 0
2's complement binary 0 1
Signed magnitude (binary) 1 0
Not used 1 1
bits 11-15
(13-17)
Real time sample bits. See NO TAG.
Sample Time 17 16 15 14 13
0.1ms 0 0 0 0 1
0.5ms 0 0 1 0 1
0.6ms 0 0 1 1 0
0.7ms 0 0 1 1 1
0.8ms 0 1 0 0 0
0.9ms 0 1 0 0 1
1.0s 0 1 0 1 0
1.5s 0 1 1 1 1
2.0s 1 0 1 0 0
2.5s 1 1 0 0 1
3.0s 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.