Allen-Bradley MicroLogix 1400 Instruction Manual page 23

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1762-OF4 Input Data File
Bit Position
15 14 13 12 11 10 9
0 Reserved
1 Reserved
The bits are defined as follows:
• SOx = General status bits for output channels 0...3. These bits are
set when an error (over- or under-range) exists for that channel, or
there is a general module hardware error.
• OOx = Over-range flag bits for output channels 0...3. These bits
indicate an input signal above the user range and can be used in the
control program for error detection. The module continues to
convert analog data to the maximum full range value while these
bits are set (1). The bits is reset (0) when the error clears.
• UOx = Under-range flag bits for output channels 0...3. These bits
indicate an input signal below the user range. They can be used in
the control program for error detection. The module continues to
convert analog data to the minimum full range value while these bits
are set (1). The bits are reset (0) when the error clears.
1762-OF4 Output Data File
For each module, slot x, words 0...3 contain the channel output data.
Raw/Proportional Format
Bit Position
15 14
0 0 Channel 0 Data 0 to 32,760
1 0 Channel 1 Data 0 to 32,760
2 0 Channel 2 Data 0 to 32,760
3 0 Channel 3 Data 0 to 32,760
Words 0...3 contain the analog output data for channels 0...3,
respectively. The module ignores the "don't care" bits (0...2), but checks
the sign bit (15). If bit 15 equals one, the module sets the output value to
0V or 0 mA.
8 7
UO0 OO0 UO1 OO1 UO2 OO2 UO3 OO3
13 12 11 10 9 8
I/O Configuration
6 5 4 3 2
SO3 SO2 SO1 SO0
7 6 5 4 3 2
0
0
0
0
Publication 1766-RM001A-EN-P - October 2008
23
1 0
1 0
0 0
0 0
0 0
0 0