Omron CPM1A Operation Manual page 31

CPM1A Features and Functions
! Caution
The following diagram shows the program execution when an interrupt occurs.
Main program
PC model
CPM1A-10CDR-j(-V1)/
10CDT-D(-V1)/10CDT1-D(-V1)
CPM1A-20CDR-j(-V1)/
20CDT-D(-V1)/20CDT1-D(-V1)/
30CDR-j(-V1)/30CDT-D(-V1)/
30CDT1-D(-V1)/40CDR-j(-V1)/
40CDT-D(-V1)/40CDT1-D(-V1)
Note When not using as interrupt input terminals, the input bits IR 00003 to IR 00006
can be used as normal input terminals.
Although IORF(97) can be used in interrupt subroutines, you must be careful of
the interval between IORF(97) executions. If IORF(97) is executed too frequent-
ly, a fatal system error may occur (FALS 9F), stopping operation. The interval
between executions of IORF(97) should be at least 1.3 ms + total execution time
of the interrupt subroutine.
Input interrupt
MOV
ADD
Interrupt program
END
Input bits
IR 00003 to IR 00004 0.3 ms
IR 00003 to IR 00006
Section 1-1
SBN00
MOV
RET
Response time
( (1 kHz in Counter Mode) )
7