Rockwell Automation 1746-INT4 Thermocouple/MV Isolated/ User Manual - Manual (Page 37)

Publication 1746-UM614B-EN-P - September 2007
Preliminary Operating Considerations 37
Chapter 6, Channel Configuration, Data, and Status, gives you detailed
bit information about the data content of the configuration word.
Input Image — Data Words and Status Words
Eight words of the SLC processor’s input image table are reserved for
the module. Input image words 0…3 (data words) hold the
temperature values of thermocouple analog inputs for channels 0…3.
The data is valid only when the channel is enabled, no errors are
detected, and not during calibration.
Input words 4…7 (status words) contain the status of channels 0…3.
Status bits for a particular channel reflect the configuration settings
that you entered into the configuration (output image) word for that
channel. To receive valid status, the channel must be enabled and the
module must have stored a valid configuration word for that channel.
During calibration, these words return calibration status.
Each input image word has a unique address based on the slot
number assigned to the module.
Example Address — To obtain the status of channel 2 (input word 6)
of the module located in slot 4 in the SLC chassis, use address I:4.6.
Chapter 6, Channel Configuration, Data, and Status, gives you detailed
bit information about the content of the data word and the status
word.
I : 4 . 6
File Type
Word Delimiter Element Delimiter
Word
Slot