Rockwell Automation 1769-BOOLEAN Compact I/O Module Reference Manual - Manual (Page 48)

Publication 1769-RM016A-EN-P - July 2006
48 Module Data, Status, and Configuration
Input Interrupts
The module will support 8 input interrupts - one each for the 8 real inputs (IN
0 to IN 7). 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 real input can have one of 2 types of interrupts selected by the user. An
interrupt can be triggered on the following conditions (the interrupt will occur
after input filtering delay):
• The input changes state from OFF (0) to ON (1).
• The input changes state from ON (1) to OFF (0).
The type of interrupt is selected for each channel by control of the IT_I bits in
word 1 of the configuration data file as follows.
The default interrupt event setting is 0:
Input change of state OFF (0)
ON (1).
Each real input's interrupt must be enabled before it will become active. Each
real input's interrupt is enabled or disabled using the EI_I bit for each input in
word 1 of the configuration data file. Set (1) the EI_I bit for an input to enable
the interrupt for that input, clear (0) the EI_I bit to disable the interrupt for
that input. The default state for each EI_I bit is 0 (interrupt disabled).
Program to Fault Enable (PFE)
If a system operating in program mode faults, this setting determines whether
the program or fault value is applied to the output. Word 2, bit 0 is used to
select the program to fault state control mode for the module's outputs. When
the bit is cleared (0), the module applies the program value determined by the
configuration data file's Program State and Program Value words. When the
bit is set (1), the module applies the fault value determined by the
configuration data file's Fault State and Fault Value words. The default setting
is 0, meaning the module applies the program value to the outputs when the
control system transitions from program mode to fault mode.
IT_I Interrupt Event
0 Input change of state OFF (0) ON (1)
1 Input change of state ON (1) OFF (0)
TIP
The MicroLogix 1500 and CompactLogix controllers do not yet
support alternate output states. This functionality is currently
only supported when the module is used on the DeviceNet
network via the 1769-ADN adapter.