Mechanism Of Positioning Control - Mitsubishi Electric MELSEC Q Series User Manual

1 OVERVIEW

1.2 Mechanism of Positioning Control

GX Developer
Creates control order
and conditions as a
sequence program.
In the positioning system using the QD74MH, software and devices are used for the
following roles. The QD74MH realizes complicated positioning control when it reads in
various signals, parameters and data and is controlled with the PLC CPU.
PLC CPU
Q74MH
Positioning module
Servo
amplifier
Servo motor
Working parts
of a machine
Stores the created program.
The QD74MH outputs the start signal and stop signal following the
stored program.
QD74MH errors, etc., are detected.
Stores the parameter and data.
Outputs data to the servo amplifier according to the instructions from
the PLC CPU and external input signal.
Receive positioning commands and control commands from QD74MH,
and drives the servo motor.
Outputs the positioning data of the servo motor and etc., and external
input signal of the servo amplifier to the QD74MH by the SSCNET .
Moves the machine according to commands from the servo amplifier.
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MELSEC-Q