A
A-4 CP1L Programming Examples
SYSMAC CP1L Getting Started Guide
121
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A-4-3 Using Interrupt Inputs to Accelerate Processes
Functions Used
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Interrupt Inputs
CP1L CPU Units normally repeat processes in the following order: overseeing
processes, program execution, I/O refreshing, peripheral servicing. During the program
execution stage, cyclic tasks are executed. The interrupt function, on the other hand,
allows a specified condition to interrupt a cycle and execute the specified program.
Interrupt inputs (direct mode) execute interrupt tasks when the built-in input of a
CPU unit switches from OFF to ON, or from ON to OFF. Interrupt tasks 140 to 145
are allocated to the input contacts. The allocation is fixed. Use interrupt inputs to
achieve faster processing that is unaffected by the scan time.
Operation Overview
Moving product (i.e. IC chips) will be inspected for curvatures and bends.
Use interrupt inputs if the normal cycle time cannot provide fast enough
processing.
Interrupt tasks will be executed when the sensor input (interrupt) changes from
OFF to ON.
Sensor input (interrupt)
Sensor input 1
Sensor input 2
Sensor input 3
Product
Sensor input (interrupt input 0)
Contact 0.04
Sensor input 1
Contact 0.00
Sensor input 2
Contact 0.01
Process
interrupt task
PASS output
Contact 100.00
NG output
Contact 100.01
Sensor input 3
Contact 0.02
RESET input
Contact 0.05
NG output sensor input 1
Contact 100.02
NG output sensor input 2
Contact 100.03
NG output sensor input 3
Contact 100.04
Process
interrupt task
Process
interrupt task
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