High-Speed Counter Interrupts; Overview - Omron CP1E CPU UNIT SOFTWARE User Manual

11 High-speed Counters

11-3 High-speed Counter Interrupts

High-speed counter interrupts can be used with any model of CP1E CPU Unit.

11-3-1 Overview

This function counts input pulses with the CPU Unit's built-in high-speed counter and executes an inter-
rupt task when the count reaches the preset value or falls within a preset range (target-value or zone
comparison). An interrupt task between 0 and 15 can be allocated with the CTBL instruction.
Cycle
Target value comparison
The specified interrupt program can be started when the
present value of the high-speed counter matches a target
value.
Instruction execution
condition
CTBL instruction executed
High-speed
Counter Unit
High-speed counter PV
Target value 1
Target value 2
0
Counting enabled
Cyclic task Interrupted
execution
Interrupt task
execution
11-14
Rotary Encoder
Present value
Cyclic tasks
(ladder programs)
Interrupt occurs
END
I/O refresh
Cyclic task Interrupted Cyclic task
execution execution
Interrupt task
execution
Built-in input
Present value matches set target value
Time
Interrupt task
Ladder diagram
END
Range comparison
The specified interrupt program can be started when the
present value of the high-speed counter enters a set range.
Instruction execution
condition
CTBL instruction executed
High-speed
Counter Unit
High-speed counter PV
Target value range
0
Time
Counting enabled
Cyclic task
execution
CP1E CPU Unit Software User's Manual(W480)
Interrupted Cyclic task Interrupted
execution
Interrupt task
Interrupt task
execution
execution
Time
Cyclic task
execution