Rockwell Automation 1790D-NOV2/TNOV2 CompactBlock LDX Analog Modules - Manual (Page 83)

Publication 1790-UM001A-EN-P - March 2002
PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-15
1790P-TN4C0 Data
Structure Analog Input Image
The input image file represents data words and status bits. Input
words 0 through 3 hold the input data that represents the value of the
analog inputs for channels 0 through 3. These data words are valid
only when the channel is enabled and there are no errors. Input word
4 holds the status bits. Analog input data is presented as
raw/proportional.
Input words 5 and 6 contain input data for two optional discrete input
expansion modules.
1790P-N4C0/TN4C0 Configuration
Each analog current input may be configured for either the 4-20mA or
0-20mA range. This is most easily accomplished using the
programming software compatible with the controller or scanner. See
page B-16 for an example of configuration using the SST PROFIBUS
Configuration Tool.
Analog input data is presented as raw/proportional. The full 12-bit
resolution is used over the entire span of the input full scale range, as
shown in Table B.5.
The input data files are the same as those shown for the
1790D-TN4CO. See page 3-2 for more information.
Table B.5
Input Full Scale
Range: HEX Data Range: Decimal Data
Range: Input Resolution:
4-20mA 0000-0FFF 0-4095 3.90
µ
A
0-20mA 0000-0FFF 0-4095 4.88
µ
A