Mechanism Of Positioning Control - Mitsubishi Electric QD70D4 User Manual

1 PRODUCT OUTLINE

1.1.2 Mechanism of positioning control

Peripheral device
GX Developer/
GX Configurator-PT
Using GX Developer, create
control sequence and conditions
as sequence program.
Adding in GX Configurator-PT
enables initial setting of
parameters and data.
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Positioning control using the QD70D is exercised using "pulse signals". (The QD70D is
a module that outputs pulses.)
In a positioning control system using the QD70D, a variety of software and external
devices are used to play their roles as shown below.
The QD70D imports various signals, parameters and data, and exercises control with
the programmable controller CPU to realize complex positioning control.
Programmable
controller CPU
positioning
Workpiece
Stores the created program.
The QD70D outputs the positioning start signal and
axis stop signal following the stired program.
QD70D errors, etc., are detected.
Input near-point dog signal and speed
-position switching signal / retry switch
signal to QD70D.
QD70D
module
Stores the parameter and data
Outputs to the drive unit according to the
instructins from the programmable
controller CPU.
Drive
unit
Receives pulses commands from QD70D,
and drives the motor.
Motor
Carries out the actual work according to
commands from the drive unit
Mechanical
system inputs
(Switches)
MELSEC-Q
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