Rockwell Automation 1769-BOOLEAN Compact I/O Module Reference Manual - Manual (Page 51)

Publication 1769-RM016A-EN-P - July 2006
Module Data, Status, and Configuration 51
Output Control (DB)
The outputs on the 1769-BOOLEAN module can be configured for two
modes of control: direct control mode or Boolean Control mode. Each output
is independently configured by use of the Disable Boolean (DB) control bits.
Word 8, bit 0 determines the output control mode for OUT0. The output
control modes for OUT1, OUT2, and OUT3 are determined similarly by bit 0
of words 16, 24, and 32. When an output's DB bit is cleared (0), the output is
configured for Boolean Control mode. When an output's DB bit is set (1), the
output is configured for direct control mode. The default setting for all DB
bits is 0 (Boolean Control mode).
Refer to Control Outputs Using Boolean Expressions on page 15, for details
on forming Boolean expressions to control the module's outputs.
Refer to Direct Control of Module Outputs on page 44, for details on
controlling the module's outputs directly from the control program.
Output Interrupts
The module will support four output interrupts - one each for the 4 outputs
(OUT0 through OUT3). Interrupts are not supported by all controllers. Refer
to your controller's user manual to determine if interrupts from expansion
I/O modules are supported.
Each output can have one of four types of interrupts selected by the user. An
interrupt can be triggered on the following conditions:
• The Boolean expression for the output transitions from FALSE to
TRUE.
• The output directed state transitions from OFF to ON.
• The Boolean expression for the output transitions from True to False.
• The output directed state transitions from ON to OFF.