Rockwell Automation 1769-XXXX Compact I/O Modules - Manual (Page 87)

Rockwell Automation Publication 1769-IN088A-EN-P - February 2011 87
I/O Memory Mapping Chapter 3
The bits are defined as follows:
• SGN = Sign bit in 2’s complement format.
• Nu = Not Used. Bit set to 0.
• Sx = General Status bit for input channels 0…15.
• Ox = Over range flag bits for input channels 0…15.
• Ux = Under range flag bits for input channels 0…15.
• Hx = High Alarm flag bits for input channels 0…15.
• Lx = Low Alarm flag bits for input channels 0…15.
Output Data File
For each module, slot
x, words 0 and 1 in the output data file contain the cancel
latched channel alarm control bits.
The bits are defined as follows:
• CLHx = Cancel High Process Alarm Latch for Input x. Allows each input
high-process-alarm latch to be individually cancelled. Cancel = 1.
• CLLx = Cancel Low Process Alarm Latch for Input x. Allows each input
low-process-alarm latch to be individually cancelled. Cancel = 1.
17 S15 S
14 S
13 S
12 S
11 S
10 S9 S8 S7 S6 S5 S4 S3 S2 S1 S0
18 L3 H3 U3 O3 L2 H2 U2 O2 L1 H1 U1 O1 L0 H0 U0 O0
19 L7 H7 U7 O7 L6 H6 U6 O6 L5 H5 U5 O5 L4 H4 U4 O4
20 L11 H
11 U
11 O
11 L
10 H
10 U
10 O
10 L9 H9 U9 O9 L8 H8 U8 O8
21 L15 H
15 U
15 O
15 L
14 H
14 U
14 O
14 L
13 H
13 U
13 O
13 L
12 H
12 U
12 O
12
Wo
rd
Bit Position
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
0 CLL
7 CLH
7 CLL
6 CLH
6 CLL
5 CLH
5 CLL
4 CLH
4 CLL
3 CLH
3 CLL
2 CLH
2 CLL
1 CLH
1 CLL
0 CLH
0
1 CLL
15 CLH
15 CLL
14 CLH
14 CLL
13 CLH
13 CLL
12 CLH
12 CLL
11 CLH
11 CLL
10 CLH
10 CLL
9 CLH
9 CLL
8 CLH
8
Wo
rd
Bit Position
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00