Rockwell Automation 1746-NI8 SLC 500 Analog Input Modules User Manual - Manual (Page 35)

4–4 Preliminary Operating Considerations
Publication 1746Ć6.8 - April 1997
Example – If you want to configure channel 2 on the analog module
located in slot 4 in the chassis, your address would be O:4.2.
O : 4 . 2
File Type
Slot
Word
Element
Delimiter
Word
Delimiter
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 input image (defined as the input from the module to the
processor) represents data words and status words.
Important: Status words are only available when the module is
configured for Class 3.
Input words 0–7 (data words) hold the input data that represent the
value of analog inputs for channels 0–7. This data word is valid only
when the channel is enabled and there are no channel errors.
Input words 8–15 (status words) contain the status of channels 0–7
respectively. The status bits for a particular channel reflect the
configuration settings that you 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 10) of the
analog module located in slot 4 in the SLC chassis, use address
I:4.10.
I : 4 . 10
File Type
Slot
Word
Element
Delimiter
Word
Delimiter
Chapter 5, Channel Configuration, Data, and Status, gives you
detailed bit information about the content of the data word and the
status word.