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Quick-response Inputs 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
processes
Program
execution
I/O
refreshing
Overseeing
processes
Program
execution
I/O
refreshing
Input signal
(00003)
IR 00003
One cycle
PC model Input bits Min. input pulse width
CPM1A-10CDR-j/10CDT-D/
10CDT1-D
IR 00003 to IR 00004
0.2 ms
CPM1A-20CDR-j/20CDT-D/
20CDT1-D/30CDR-j/
30CDT-D/30CDT1-D/
40CDR-j/40CDT-D/
40CDT1-D
IR 00003 to IR 00006
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
Interval timer time-out
Interrupt program
MOV
ADD
END
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.
Interval Timer Function
(Scheduled Interrupts)
CPM1A Features and Functions Section 1-1