Reading Data From Your Module; Mapping Data For The Thermocouple/Rtd/Mv Module; Thermocouple/Rtd/Mv Input Module (1794-Irt8) Read Words - Allen-Bradley 1794-IRT8 User Manual

Reading Data From Your
Module
Mapping Data for the
Thermocouple/RTD/mV
Module
Decimal 15 14
Octal 17 16
Word ⇓
0
1
2
3
4
5
6
7
Writing Configuration to and Reading Status from Your Module with a Remote I/O Adapter
Read programming moves status and data from the TC/RTD input module
to the processor's data table in one I/O scan. The processor's user
program initiates the request to transfer data from the TC/RTD input
module to the processor.
The following read and write words and bit/word descriptions describe
the information written to and read from the TC/RTD input module. The
module uses up to 11 words of input data and up to 4 words of output
data. Each word is composed of 16 bits.
Thermocouple/RTD Input Module (1794-IRT8) Image Table
Mapping
I/O Image
Input Size
1 to 11 Words
Output Size
0 to 4 Words

Thermocouple/RTD/mV Input Module (1794-IRT8) Read Words

13 12 11 10
15 14 13 12
Overrange
Alarms
RFlg
Data Format
Mode Sensor Type
TC/RTD
CFlg
09 08 07
11 10 07
Read
Channel 0 Input Data
Channel 1 Input Data
Channel 2 Input Data
Channel 3 Input Data
Channel 4 Input Data
Channel 5 Input Data
Channel 6 Input Data
Channel 7 Input Data
Module Image
Input Data Channel 0
Input Data Channel 1
Input Data Channel 2
Input Data Channel 3
Input Data Channel 4
Input Data Channel 5
Input Data Channel 6
Input Data Channel 7
Underrange
CJC
EDT command and response
FM Reference Jct
Mode
TC/RTD
RTD Offsets for each channel
EDT command and data
06 05 04 03 02 01 00
06 05 04 03 02 01 00
Publication 1794-6.5.12 - November 1997
4-3
Diagnostics
Filter Cut
Sensor Type