Allen-Bradley MicroLogix 1100 Instruction Set Reference Manual page 276

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276 Using Interrupts
Publication 1763-RM001C-EN-P - October 2009
EII User Interrupt Pending (UIP)
Sub-Element Description Address
UIP - User Interrupt Pending EII:0/UIP
UIP (User Interrupt Pending) is a status flag that represents an interrupt is
pending. This status bit can be monitored, or used for logic purposes, in
the control program if you need to determine when a subroutine cannot
execute immediately.
This bit is automatically set and cleared by the controller. The controller
can process 1 active and maintain up to 2 pending user interrupt
conditions before it sets the pending bit.
EII Event Interrupt Enable (EIE)
Sub-Element Description Address
EIE - Event Interrupt Enabled EII:0/EIE
EIE (Event Interrupt Enabled) allows the event interrupt function to be
enabled or disabled from the control program. When set (1), the function
is enabled, when cleared (0, default) the function is disabled.
This bit is controlled by the user program and retains its value through a
power cycle.
EII Auto Start (AS)
Sub-Element Description Address
AS - Auto Start EII:0/AS
AS (Auto Start) is a control bit that can be used in the control program.
The auto start bit is configured with the programming device and stored
as part of the user program. The auto start bit automatically sets the EII
Event Interrupt Enable (EIE) bit when the controller enters any executing
mode.
Data Format Type User Program
Access
binary (bit) status read only
Data Format Type User Program
Access
binary (bit) control read/write
Data Format Type User Program
Access
binary (bit) control read only