Analog input data file -2, Analog input data file – Rockwell Automation 1790D-NOV2/TNOV2 CompactBlock LDX Analog Modules User Manual
Page 36
Publication 1790-UM001A-EN-P - March 2002
3-2 Module Data, Status, and Channel Configuration for Analog Input Modules
Analog Input Data File
The input data table allows you to access analog input module and
data for use in the control program, via word and bit access. The data
table structure is shown below.
1790D-N4C0/-TN4C0, 1790D-N4V0/-TN4V0 Input Data File
Word/Bit Descriptions
Word
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
Not Used
Analog Input Data Channel 0
1
Not Used
Analog Input Data Channel 1
2
Not Used
Analog Input Data Channel 2
3
Not Used
Analog Input Data Channel 3
4
Not Used
S3
S2
S1
S0
Word
Decimal Bit
Description
Read Word 0
Bits 00-11
Channel 0 input data
Bits 12-15
Not used: Set to 0
Read Word 1
Bits 00-11
Channel 1 input data
Bits 12-15
Not used: Set to 0
Read Word 2
Bits 00-11
Channel 2 input data
Bits 12-15
Not used: Set to 0
Read Word 3
Bits 00-11
Channel 3 input data
Bits 12-15
Not used: Set to 0
Read Word 4
Bits 00-03
Status bits for individual channels - Bit 00 corresponds to input
channel 0, bit 01 corresponds to input channel 1 and so on.
When set (1) indicates:
•
No field power
•
Open wire (4-20mA current input only)
•
Under range (4-20mA current input only)
•
Recoverable module fault (whole channel to be set)
•
Unrecoverable module fault (whole channel to be set)
Bits 04-15
Not used: Set to 0