Outline Of Positioning Control And Count Operation; Mechanism Of Positioning Control - Mitsubishi MELSEC-Q Series User Manual

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PRODUCT OUTLINE
1.2

Outline of Positioning Control and Count Operation

1.2.1

Mechanism of positioning control

Positioning control using the QD72P3C3 is performed using "pulse signals". (The
QD72P3C3 is a module that outputs pulses.)
In a positioning control system using the QD72P3C3, a variety of software and external
devices are used to play their roles as shown below.
The QD72P3C3 realizes complex positioning control by importing and controlling various
signals, parameters, and data with the programmable controller CPU.
Peripheral
GX Developer/
GX Configurator-PT
Using GX Developer, creates
control sequence and conditions
as a sequence program.
Adding in GX Configurator-PT
enables initial setting of
parameters and data.
Stores the created program.
Outputs the positioning start signal
(Y8 to YA) and axis stop signal
(Y4 to Y6) to the QD72P3C3 according
to the stored program.
Detects such as QD72P3C3 errors.
Programmable
controller CPU
QD72P3C3
positioning module
Stores the parameters and data.
Outputs pulses to the drive unit according to the
commands from the programmable controller CPU.
Drive unit
Drives the motor upon reception of
command pulses from the QD72P3C3.
Motor
Performs actual operation according
to commands from the drive unit.
Workpiece
1.2 Outline of Positioning Control and Count Operation
1.2.1 Mechanism of positioning control
Inputs the near-point dog signal and
upper/lower limit signal to the QD72P3C3.
Mechanical system
inputs (switches)
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