Rockwell Automation 1771-IR , D17716.5.76 RTD INPUT MODULE - Manual (Page 26)

Module Configuration
Chapter 5
5Ć2
You must indicate what format will be used to read data from your module.
Typically, BCD is selected with PLC–2 processors, and binary (also referred to
as integer or decimal) is selected with PLC–3 and PLC–5 processors. See
Table 5.A and Appendix C for details on Data Format.
Table 5.A
Selecting Format for Reading Data
Decimal Bit 10
Octal Bit 12
Decimal Bit 9
Octal Bit 11
Data Format
0 0 BCD
0 1 2's complement binary
1 0 Signed magnitude binary
1 1 Same as signed magnitude binary
The RTD input module accepts the following types of RTD inputs:
RTD Temperature Range Indication Word 1,
Bit 10 Ohms
o C o F
Platinum -200 to +870 o C (-328 to 1598 o F) Underrange 0 1.00 -200 -328
Overange 600.00 870 1598
Copper -200 to +260 o C (-328 to 500 o F) Underrange 1 1.00 -200 -328
Overrange 327.67 260 500
The units of measure reported by the RTD module are selected by setting bits
06–07 in BTW word 1.
Units of Measure Bit
07 06
Degrees C 0 0
Degrees F 0 1
Ohms 1 0
Not used 1 1
If any of bits 0–5 are set (1), the corresponding input channel will be reported in
ohms.
Data Format
RTD Type
Units of Measure