Omron CPM1A Manual page 17

Input Interrupt Mode
If an input interrupt occurs, the regu-
lar program shuts down irrelevant of
the cycle time, and the interrupt pro-
cessing program is executed im-
mediately.
Counter Mode
When the number of external signals counted at high speed reaches a specified number of counts, the regular program shuts down, and
the interrupt processing program is executed at fixed counts. The count can be set between 0 and 65535.
Regular program
Input interrupt
Counter setting
J QUICK-RESPONSE INPUTS
Quick-response inputs can detect input signals with a pulse width
as short as 0.2 ms regardless of their timing during the scan
cycle. Quick-response inputs and interrupt inputs use the same
input terminals.
Overseeing Program
processes execution
0.2 ms min
Input signal
(00003)
IR 00003
One cycle
Micro Programmable Controller
A--38
Regular program
Input interrupt
Interrupt program
I/O Overseeing Program
refreshing processes execution
CPM1A
Interrupt program
Regular program
CPU Input no.
10 point I/O CPU 00003 to 00004
20 point, 30 point, 00003 to 00006
40 point I/O CPU
Application Example:
Calculating the Number of Chips
I/O
refreshing
The metal sensor counts the number of
parts that have passed. Steady counting
can be achieved even when the input-ON
time is short.
F2LP-WK4
Regular program
Minimum input
pulse width
0.2 ms
CPM1A
F2LP-W