Rockwell Automation 1769-BOOLEAN Compact I/O Module Reference Manual - Manual (Page 45)

Publication 1769-RM016A-EN-P - July 2006
Module Data, Status, and Configuration 45
Virtual Inputs
The control program determines eight virtual inputs. The module's outputs
can be controlled by the module itself when the outputs are configured to use
Boolean Control mode.
Refer to Output Control (DB) on page 51, for information on configuring the
module's outputs for Boolean Control mode.
When a module output is configured for Boolean Control mode, the Boolean
expression controlling the output state can be configured to use any of the
virtual inputs (V0 through V7) as operands.
Refer to Operands on page 52, for information on configuring Boolean
expression operands.
The values of the virtual inputs can be updated by the control program at any
time. The most recent values will be used by the module in the Boolean
expressions that are controlling the module's outputs. Word 1, bits 0…7 of the
output data file are used to control the values of the virtual inputs. Setting a bit
(1) assigns a logical value of TRUE, clearing a bit (0) assigns a logical value of
FALSE.