Mechanism Of Positioning Control - Mitsubishi Electric MELSECQ Series User Manual

1 PRODUCT OUTLINE

1.1.2 Mechanism of positioning control

1
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 QD70 is exercised using "pulse signals". (The QD70 is a
module that outputs pulses.)
In a positioning control system using the QD70, a variety of software and external
devices are used to play their roles as shown below.
The QD70 imports various signals, parameters and data, and exercises control with
the programmable controller CPU to realize complex positioning control.
search engine
Stores the created program.
The QD70 outputs the positioning start signal and
axis stop signal following the stired program.
QD70 errors, etc., are detected.
Programmable
controller
CPU
Input near-point dog signal and speed
-position switching signal to QD70.
QD70
positioning
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 QD70,
and drives the motor.
Motor
Carries out the actual work according to
commands from the drive unit
Workpiece
MELSEC-Q
Mechanical
system inputs
(Switches)
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