Output data file – Rockwell Automation 1769-IF4I CompactLogix Isolated Analog Input Module User Manual
Page 15
CompactLogix Isolated Analog Input Module 15
Publication 1769-IN074C-EN-P - March 2011
The bits are defined as follows:
•
SGN = Sign bit in two’s complement format
•
Nu = Not used. Bit set to 0
•
Sx = General status bit for input channels 0…3
•
Lx = Low alarm flag bits for input channels 0…3
•
Hx = High alarm flag bits for input channels 0…3
•
Ux = Under-range flag bits for channels 0…3
When set, the input signal is under normal range or an open circuit condition exists, in
the case of the 4…20 mA range.
•
Ox = Over-range flag bits for channels 0…3
When set, the input signal is over normal range or an open circuit condition exists (open
circuit detection applies to voltage input ranges only).
Output Data File
For each input module, slot x, word 0 in the output data file contains the analog values of the
outputs.
The bits are defined as follows:
•
Nu = Not used. Bit set to 0
•
UHx = Cancel High Process Alarm Latch x
Allows each high process alarm latch to be individually cancelled. Cancel = 1.
•
ULx = Cancel Low Process Alarm Latch x
Allows each low process alarm latch to be individually cancelled. Cancel = 1.
Wo
rd
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
Nu
Nu
Nu
Nu
Nu
Nu
Nu
Nu
UL3 UH3 UL2 UH2 UL1 UH1 UL0 UH0