Mechanism Of Positioning Control - Mitsubishi Electric QD77MS User Manual

1.1.3 Mechanism of positioning control

GX Works2
Sets the parameters and
positioning data for control.
Outputs the start command for
JOG operation, etc., during test
operation with the test function.
Monitors the positioning
operation.
In the positioning system using the Simple Motion module, various software and
devices are used for the following roles.
The Simple Motion module realizes complicated positioning control when it reads in
various signals, parameters and data and is controlled with the PLC CPU.
Creates control order and
conditions as a sequence
program.
Stores the created program.
The PLC CPU outputs the start signal and
stop signal following the stored program
to the QD77MS.
QD77MS errors, etc., are detected.
PLC CPU
QD77MS
Simple Motion
module
Stores the parameter and data.
Outputs data to the servo amplifier according to the
instructions from the PLC CPU, GX Works2, external
signals and manual pulse generator.
Servo
amplifier
Receives positioning commands and control
commands from QD77MS, and drives the servo motor.
Outputs the positioning data such as the servo motor
to the QD77MS by the SSCNET
Servo motor
Moves the machine according to commands from
the servo amplifier.
Working
parts of a
machine
1 - 8
Chapter 1 Product Outline
Outputs signals such as the start
signal, external command signal and
switching signal to the QD77MS.
Issues commands by
pulse output.
External signal
Manual pulse generator/
Incremental synchronous encoder
(/H).