Rockwell Automation 1769-XXXX Compact I/O Modules - Manual (Page 71)

Rockwell Automation Publication 1769-IN088A-EN-P - February 2011 71
I/O Memory Mapping Chapter 3
Output Data File
For each input module, slot
x, word 0 in the output data file contains alarm
unlatch 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.
Configuration Data File
The manipulation of the bits from this file is normally done with programming
software, such as RSLogix 500, RSLogix 5000, or RSNetWorx for DeviceNet,
during initial configuration of the system. In that case, graphical screens are
provided by the programmer to simplify configuration. However, some systems,
like the 1769-ADN DeviceNet adapter, also allow the bits to be altered as part of
the control program, using communication rungs. In that case, it is necessary to
understand the bit arrangement. Refer to the Compact Analog I/O User Manual,
publication number
1769-UM002 for additional details.
Wo
rd
Bit Position
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 CL
L7 CL
H7 CL
L6 CL
H6 CL
L5 CL
H5 CL
L4 CL
H4 CL
L3 CL
H3 CL
L2 CL
H2 CL
L1 CL
H1 CL
L0 CL
H0
Wo
rd
Bit Position
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 Real Time Sample Value
1 ERTS Reserved
2 EC Reserved EA AL EI Reserved Input Filter Sel Chl0
3 Reserved Inpt Dta Fm
Chl0 Reserved Inpt Tp/RngeSel Chl0
4 S Process Alarm High Data Value Channel 0
5 S Process Alarm Low Data Value Channel 0
6 S Alarm Dead Band Value Channel 0
7 Pad
8 EC Reserved EA AL EI Reserved Inpt Filter Sel Chl1
9 Reserved Inpt Dta Fm
Chl1 Reserved Inpt Tp/RngeSel Chl1
10 S Process Alarm High Data Value Channel 1
11 S Process Alarm Low Data Value Channel 1