Input Image-Data Words And Status Words - Allen-Bradley SLC 500 User Manual

Chapter 5, 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

The 8-word, thermocouple module input image (defined as the input
from the thermocouple module to the CPU) represents data words
and status words.
Input words 0-3 (data words) hold the input data that represent the
temperature value of thermocouple analog inputs for channels 0-3.
This data word is valid only when the channel is enabled and there
are no channel errors.
Input words 4-7 (status words) contain the status of channels 0-3
respectively. The status bits for a particular channel reflect the
configuration settings that you have entered into the output image
configuration word for that channel and provide information about
the channel's operational state. To receive valid status information the
channel must be enabled, and the channel must have processed any
configuration changes that may have been made to the configuration
word.
Example - To obtain the status of channel 2 (input word 6) of the
thermocouple module located in slot 4 in the SLC chassis, use address
I:4.6.
Chapter 5, Channel Configuration, Data, and Status, gives you
detailed bit information about the content of the data word and the
status word.
Preliminary Operating Considerations
Slot
File Type
Word
I : 4 . 6
Element
Word
Delimiter
Delimiter
Publication 1746-UM007C-EN-P - July 2004
4-3