Rockwell-automation 1746-NI16V SLC 500 Analog Input Modules User Manua User Manual download pdf (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.

1 2 ... 59 60 61 62 63 64 65 66 67 68 69 ... 119 120

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Rockwell-automation 1746-NI16V SLC 500 Analog Input Modules User Manua User Manual Page 64