Rockwell Automation 1746-XXXX SLC 500 4-Channel Analog I/O Modules User Manual - Manual (Page 40)

Publication 1746-UM005B-EN-P - June 2004
4-2 Module Operation and System Considerations
Addressing Analog Modules
NI4 - Each input channel of the NI4 is addressed as a single word in
the input image table. The NI4 uses a total of 4 words in the input
image table. The converted values from channels 0 through 3 are
addressed as input words 0 through 3 respectively for the slot where
the module resides.
NIO4I and NIO4V - Each input channel of the NIO4I and NIO4V is
addressed as a single word in the input image table and each output
channel of the module is addressed as a single word in the output
image table. Both the NIO4I and NIO4V use a total of 2 input words
and 2 output words.
The converted input values from input channels 0 and 1 are addressed
as words 0 and 1 of the slot where the module resides. The output
values for the output channels 0 and 1 are addressed as output words
0 and 1 of the slot where the module resides.
NO4I and NO4V - Each output channel of the NO4I and NO4V is
addressed as a single word in the output image table. Both modules
use a total of 4 output words. The converted output values from
output channels 0 through 3 are addressed as words 0 through 3
respectively for the slot where the module resides.
EXAMPLE
If you want to address input channel 2 of the NI4 in
slot 4, you would address it as input word 2 in slot 4
(I:4.2).
EXAMPLE
If you want to address output channel 0 of the NIO4I
in slot 3, you would address it as output word 0 in
slot 3 (O:3.0).
EXAMPLE
If you want to address output channel 3 of the NO4I
in slot 3, you would address it as output word 3 in
slot 3 (O:3.3).