Rockwell Automation 1771-IR Series D RTD Input Module User Manual User 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<bias<9999.
Words 9-14
Individual channel calibration words.