Allen-Bradley 1794-IRT8 - Data Mapping and Image Table

Publication 1794-6.5.12 - November 1997
Writing Configuration to and Reading Status from Your Module with a Remote I/O Adapter 4-3
Reading Data From Your
Module
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.
Mapping Data for the
Thermocouple/RTD/mV
Module
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
Thermocouple/RTD/mV Input Module (1794-IRT8) Read Words
Module Image
I/O 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
Input Size
Output Size
0 to 4 Words
1 to 11 Words
Overrange
DiagnosticsCJCAlarms
EDT command and responseRFlg
EDT command and dataCFlg
RTD Offsets for each channel
Sensor TypeSensor TypeMode Mode
TC/RTDTC/RTD
Filter CutReference Jct
Data Format
FM
Decimal 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Octal 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00
Word ⇓ Read
0 Channel 0 Input Data
1 Channel 1 Input Data
2 Channel 2 Input Data
3 Channel 3 Input Data
4 Channel 4 Input Data
5 Channel 5 Input Data
6 Channel 6 Input Data
7 Channel 7 Input Data