Configure the module – Rockwell Automation 1771-IR INSTL.INSTR RTD INPUT MODULE User Manual
Page 7
RTD Input Module
7
Publication 1771-5.50 – October 1996
Use the configuration information below to configure your module
to your specifications.
Dec. Bits
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
De
o
Octal Bits
17
16
15
14
13
12
11
10
07
06
05
04
03
02
01
00
Description
Word 1
Real Time Sampling -
default = no RTS
Data
Format
RTD
Type
Units of
Measure
Single channel in ohms
Real time sampling, data format, RTD
type units of measure, and single
channel in ohms
3.1s
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
If any of these bits are set, the corresponding input
channel will be reported in ohms. If RTDs other than 10
ohm copper or 100 ohm platinum are used you must
report those channels in ohms, not degrees. Data format
on a channel displayed in ohms will default to binary.
Determines what units of measure
the module reports.
Units of measure Bit 07 Bit 06
Degrees C
Degrees F
Ohms
Not used
0
0
0
1
1
0
1
1
Set to match your
processor.
BCD (default)
Reserved
Two’s complement binary
Signed magnitude binary
Bit 10 Bit 09
0
0
1
1
0
1
0
1
0.5s
0.4s
0.3s
0.2s
0.1s
1.0s
0.6s
0.7s
0.8s
0.9s
0
0
0
0
0
0
0
0
0
0
0
1
1
1
0
1
1
1
0
0
0
0
0
1
1
0
0
1
1
1
0
1
0
1
0
0
0
0
0
0
0
0
1
1
1
1
0
1
1
1
0
0
0
0
1
1
0
0
1
0
1
1
1
0
0
0
0
1
1.5s
2.0s
2.5s
3.0s
0
0
0
1
1
0
1
1
1
1
1
1
No RTS (50ms)
Important: Use decimally addressed bit
locations for PLC-5 processors.
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.
10 ohm resistance @ 25
_C
3, 4, 5, 6, 7, 8
Individual channel bias - entered in BCD. This value is subtracted from the channel data in the Channel 1-6 bias 9, 10, 11, 12, 13, 14, 15 Channel 1-6 calibration Individual channel calibration 15 Not used Channel failed calibration FC EE Not used S G O auto-calibration request word Offset calibration complete Gain calibration complete Save complete EEPROM fault Faulty calibration (no save) For detailed configuration Configure the Module
BTR. The bias value is always a positive number. Bias value range is 0
information, see chapter 5 of your
RTD Input Module User Manual
(publication 1771-6.5.76).