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1.1.3 Mechanism of positioning control
Positioning control using the D75P2 is carried out with "pulse signals". (The D75P2 is a
module that generates pulses). In the positioning system using the D75P2, various
software and devices are used for the following roles. The D75P2 realizes complicated
positioning control when it reads in various signals, parameters and data and is
controlled with the PLC CPU.
CC-Link
master/local
module
Outputs signals such as the start
signal, stop signal, limit signal and
control changeover signal to the D75P2.
AD75
software
package
D75P2 positioning
module
External signal
Manual pulse
generator
Issues commands by
transmitting pulses.
Sets the parameters and
positioning data for control.
Outputs the start command for
JOG operation, etc., during test
operation with the test mode.
Monitors the positioning operation.
Servo
amplifier
Stores the parameter and data.
Outputs pulses to the servo according to the
instructions from the PLC CPU, AD75 software
package, external signals and manual pulse generator.
Receives pulse commands from D75P2,
and drives the motor.
Outputs the drive unit READY signal and
zero point signal to the D75P2.
Motor
Workpiece
Carries out the actual work according to commands
from the servo.
Creates control order and
conditions as a sequence
program.
Stores the created program.
The D75P2 outputs the start signal and
stop signal following the stored program.
D75P2 errors, etc., are detected.
GPP function
software
package
PLC CPU
Communicates with the D75P2, using RX as
input and RY as output.