Omron CPM1A operation manual PC model Input bits Min. input pulse width, Mode Function

CPM1A Features and Functions Section 1-1

Quick-response Inputs

Interval Timer Function (Scheduled Interrupts)

The CPM1A-10CDR-j/10CDT-D/10CDT1-D PCs have 2 quick-response input terminals and the CPM1A-20CDR-j/20CDT-D/20CDT1-D, CPM1A- 30CDR-j/30CDT-D/30CDT1-D and CPM1A-40CDR-j/40CDT-D/40CDT1-D PCs have 4 quick-response input terminals. (The same terminals are used for quick-response inputs and interrupt inputs.)

Quick-response inputs have an internal buffer, so input signals shorter than one cycle can be detected.

Overseeing	Program	I/O	Overseeing	Program	I/O
processes	execution	refreshing	processes	execution	refreshing

Input signal (00003)

IR 00003

One cycle

PC model	Input bits	Min. input pulse width
CPM1A-10CDR-j/10CDT-D/	IR 00003 to IR 00004	0.2 ms
10CDT1-D
CPM1A-20CDR-j/20CDT-D/	IR 00003 to IR 00006
20CDT1-D/30CDR-j/
30CDT-D/30CDT1-D/
40CDR-j/40CDT-D/
40CDT1-D

CPM1A PCs are equipped with an interval timer which can be set from 0.5 ms to 319,968 ms in units of 0.1 ms. The timer can be set to trigger a single interrupt (one-shot mode) or to trigger scheduled interrupts (scheduled interrupt mode).

Main program

MOV

ADD

END

Interval timer time-out

Interrupt program

SBN00

MOV

RET

Mode	Function
One-shot	Generates a single interrupt the first time that the timer times
	out.
Scheduled interrupt	Generates an interrupt each time that the timer times out.

Pulse Output Function	Since the CPM1A with transistor output has a pulse output function capable of
	outputting a pulse of 20 Hz to 2kHz (single-phase output), a stepping motor can
	be controlled by the CPU Unit alone.

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