Rockwell Automation 1746-NI16V SLC 500 Analog Input Modules User Manual - Manual (Page 64)

Publication 1746-UM001A-US-P
5-16 Channel Configuration, Data, and Status
Channel Status Checking If the module is in Class 3 mode, there are 8 additional input image
words available for status information. The channel status word is a
part of the module’s input image. Input words 16 to 31 correspond to
and contain the configuration status of channels 0 to 15. You can use
the data provided in the status word to determine if the input
configuration data for any channel is valid per your configuration in
O:e.0 through O:e.15.
For example, whenever a channel is disabled (O:e.x/15 = 0), its
corresponding status word shows all zeros. This condition tells you
that input data contained in the data word for that channel is not valid
and should be ignored.
Class 1 Status Word
Bit 1 set to
(1)
Bit 0 set to
(1)
I:e.0 channel 0 status word bit-mapped field 1 0
I:e.1 channel 1 status word bit-mapped field 1 0
I:e.2 channel 2 status word bit-mapped field 1 0
I:e.3 channel 3 status word bit-mapped field 1 0
I:e.4 channel 4 status word bit-mapped field 1 0
I:e.5 channel 5 status word bit-mapped field 1 0
I:e.6 channel 6 status word bit-mapped field 1 0
I:e.7 channel 7 status word bit-mapped field 1 0
I:e.0 channel 8 status word bit-mapped field 1 1
I:e.1 channel 9 status word bit-mapped field 1 1
I:e.2 channel 10 status word bit-mapped field 1 1
I:e.3 channel 11 status word bit-mapped field 1 1
I:e.4 channel 12 status word bit-mapped field 1 1
I:e.5 channel 13 status word bit-mapped field 1 1
I:e.6 channel 14 status word bit-mapped field 1 1
I:e.7 channel 15 status word bit-mapped field 1 1
(1) In Class 1, bit 1 determines whether data or status resides in the input image. Bit 0 determines whether
channels 0 through 7 or 8 through 15 are shown.