Mitsubishi MELSEC QCPU User Manual

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MELSEC-Q/QnA
6 BASIC INSTRUCTIONS
POINT
(1) The PLSY instruction registers the argument device data in the CPU module work area,
and the actual output operation is processed during system interrupts.
(The device data registered to the work area of the CPU module are cleared when the
command input is turned OFF or when the CPU module is STOPped and then RUN.)
Therefore, to count the pulses, it is necessary to provide their ON and OFF time as long as
the interrupt time of the CPU module or longer.
The interrupt time of individual CPU module is shown below:
CPU module Type Name Interrupt Time
High Performance model QCPU, Process CPU 1ms
QnACPU 5ms
(2) Do not change the argument of the PLSY instruction during pulse output by the PLAY
instruction (while the command input is ON).
Turn OFF the command input before changing the argument.
(3) For this reason, the PLSY instruction can be used only once in the entire program executed
by the CPU module.
[Operation Errors]
(1) There are no operation errors associated with the PLSY instruction.
[Program Example]
(1) The following program outputs a 10 Hz pulse 5 times to Y20 when X0 is ON.
[Ladder Mode] [List Mode]
Steps
Instruction
Device
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Mitsubishi MELSEC QCPU Specifications

General

Brand	Mitsubishi
Model	MELSEC QCPU
Category	Controller
Language	English