Output data file, Output data file -7, Output data words 0 and 1 -7 – Rockwell Automation 1769-IF4XOF2 Compact 8-Bit Low Resolution Analog I/O Combination Module User Manual
Page 51: Output data words 0 and 1
Publication 1769-UM008A-EN-P - November 2001
1769-IF4XOF2 Module Data, Status, and Configuration Channels 4-7
Output Data File
The output file contains the module’s analog output data information.
Word 0 and 1, bits 7 through 14 contain the output data bits for
channels 0 and 1.
The output data file applies only to output data from the module as
shown in the table below.
Output Data Words 0 and 1
The SGN bit of Words 0 and 1 is always zero (0). The following table
illustrates the format of the output data.
Table 4.4 Output Data File
Wo
rd
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
SGN
Analog Output Data Channel 0
0
0
0
0
0
0
0
1
SGN
Analog Output Data Channel 1
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
SGN
A7
A6
A5
A4
A3
A2
A1
A0
0
0
0
0
0
0
0
IMPORTANT
Bits 0 through 6 and Bit 15 of output data words 0
and 1 should always be set to zero in your control
program. If they are not set to 0, the invalid data flag
(Ex) will be set for that channel. However the
channel will continue to operate with the previously
converted value. If a MVM (Move with Mask)
instruction is used with a mask of 7F80 (hexidecimal)
to move data to the output words, writing to bits 0
through 6 and bit 15 can be avoided.