Rockwell Automation Publication 1769-IN088A-EN-P - February 2011 187
I/O Memory Mapping Chapter 3
1769-BOOLEAN
The following I/O memory mapping lets you configure the 1769-BOOLEAN
module.
Input Data File
For each module, slot x, word 0 in the input data file contains the state of the
module’s real input points. Word 1 in the input data file contains the state of the
module’s output data (output data echo). During normal operation, this word
represents the values that the outputs are directed to by the control program (in
Direct Control mode) or by the module (in BOOLEAN Control mode).
The bits are defined as follows:
• Shaded bit positions must be set to 0.
• INx = State of module’s real inputs 0…7.
• Ox = Data echo of directed states of module outputs 0…3; 1 = output on,
0 = output off.
Output Data File
For each module, slot x, word 0 in the output data file contains the control
program’s directed state of the module’s output points when operated in Direct
Control mode. Direct Control mode is active when an output’s disable
BOOLEAN (DB_x) bit is set in the configuration data file. Word 1 contains the
control program’s directed states of the virtual inputs, which can be used in
controlling the module’s output points via BOOLEAN expressions.
The bits are defined as follows:
• Shaded bit positions must be set to 0.
• OUTx = Output state in Direct Control mode; 1 = output on, 0 = output
off.
• Vx = Virtual inputs 0…7.
Word
Bit Position
1514131211109876543210
0 IN7IN6IN5IN4IN3IN2IN1IN0
1
O3 O2 O1 O0
Word
Bit Position
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0
OUT3 OUT2 OUT1 OUT0
1
V7 V6 V5 V4 V3 V2 V1 V0
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