Omron CPM1 Programming Manual

85
SRM1 Interrupt Functions Section 1-7
DM 0038 0000
DM 0039 FFFF Range 8 interrupt subroutine not executed
The following diagram shows the example ladder program. DM 6642 must be
set to 01@0, where @ is the reset method which can be set to 0 or 1.
1-7 SRM1 Interrupt Functions
This section explains the settings and methods for using the SRM1 interrupt
functions.
1-7-1 Types of Interrupts
The SRM1 has only one type of interrupt processing, as outlined below.
Interval Timer Interrupts
Interrupt processing is executed by an interval timer with a precision of
0.1 ms.
1-7-2 Interval Timer Interrupts
The SRM1 is equipped with one interval timer. When the interval timer times
out, the main program is interrupted and the interrupt program is executed
immediately, regardless of the point in the cycle.
There are two modes for interval timer operation, the One-shot Mode, in
which only one interrupt will be executed when time expires, and the Sched-
uled Interrupt Mode in which the interrupt is repeated at a fixed interval.
The interval timer’s set value can be set anywhere from 0.5 to 319968 ms, in
units of 0.1 ms.
Operation Use the following instruction to activate and control the interval timer.
Starting Up in One-Shot Mode
Use the STIM(69) instruction to start the interval timer in the one-shot mode.
25315 (ON for first cycle)
SBN(92) 040
CTBL(63)
000
001
DM 0000
Registers comparison table, range comparison mode
First word of the comparison table
Interrupt program 40
SBN(92) 041
Interrupt program 41
RET(93)
RET(93)
(@)STIM(69)
C
1
C
2
C
3
C
1
: Interval timer, one-shot mode (000)
C
2
: Timer set value (first word address)
C
3
: Subroutine no. (4 digits BCD): 0000 to 0049

Omron CPM1 Specifications

General

Brand	Omron
Model	CPM1
Category	Controller
Language	English