Allen-Bradley MicroLogix 1100 Instruction Set Reference Manual

Publication 1763-RM001C-EN-P - October 2009
552 Knowledgebase Quick Starts
Example: A Block of logic that needs to be scanned more often then the
rest of the ladder program.
Getting Started:
Locate the Function Files under Controller in RSLOGIX 500 v7.00.00 or
later and select the STI tab (See Below)
Enter the following parameters as the “Minimum Configuration” required
for the STI
Example
The following example configures the STI to execute sub-routine file #3
(PFN=3) every 2 seconds (SPM=2000). In the subroutine file there is an
ADD instruction simply adding the value of 1 to N7:0 each time the
sub-routine is scanned.
STI:0.PFN Program File Number defines which subroutine is
executed when the SPM value has timed out. The Integer
number entered must be a valid sub-routine program file
(3 to 255).
STI:0/AS Auto-Start defines if the STI function will automatically
start when the MicroLogix 1500 enters run or test.
STI:0/UIE User Interrupt Enabled control bit is used to enable or
disable the STI subroutine from processing.
STI:0.SPM Setpoint (in milliseconds) defines the interval that the
interrupt will scan the PFN sub-routine.
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Allen-Bradley MicroLogix 1100 Specifications

General

Brand	Allen-Bradley
Model	MicroLogix 1100
Category	Controller
Language	English