1. Conveyor Drive
Chapter 1 Control Specification and Programming
Control Objective
Operate the conveyor according to the sensor data.
Control Specifications
The following operation should be performed in this unit.
Study the required specifications and then create the program and confirm the operation.
1) When [PB1] (X20) on the operation panel is pressed, Supply command (Y7) for the robot is turned
ON if the robot is at Starting point (X5).
When [PB1] (X20) is released, Supply command (Y7) is latched on until the robot returns to the
Starting point (X5).
2) When Sensor (X0) detects a part, Upper conveyor forward (Y0) is set ON.
3) When Sensor (X1) detects a part, Middle conveyor forward (Y2) is set ON and Upper conveyor
forward (Y0) stops.
4) When Sensor (X2) detects a part, Lower conveyor forward (Y4) is set ON and Middle conveyor
forward (Y2) stops.
5) When Sensor (X3) detects a part, Lower conveyor forward (Y4) stops.
6) When Sensor (X3) is set ON, Supply command (Y7) for the robot is turned ON and a new part is
supplied if the robot is at Starting point (X5).
CAUTION
• In this exercise, write the program on the assumption that only one part is put on the conveyor at a
time.
• An advanced program is required to control two or more parts. This program is beyond the scope of this
exercise.
Chapter 2 Tips for Writing the Program
CAUTION
Click the ladder program area to enable operation. The title bar will turn blue.
Key operations are not enabled when the title bar and menu items are grayed out.
1 Click the [Edit Ladder] button on the remote control.
2 Input a program.
3 Press the [F4] key to convert the program.
4 Select "Online" - "Write to PLC" in the ladder program area to write the program to the PLC.
2. Chapter 3 Tips for Program Confirmation
1 Press [PB1] (X20) on the operation panel.
Result >> A part is supplied from the robot.
2 Operation when Sensor (X0) detects a part
Result >> The upper conveyor moves to the right and the part is carried to the middle conveyor.
3 Operation when Sensor (X1) detects a part
Result >> The middle conveyor moves to the right and the part is carried to the lower conveyor.
The middle conveyor stops.
4 Operation when Sensor (X2) detects a part
Result >> The lower conveyor moves to the right and the part is carried to the tray.
The lower conveyor stops.
5 After Sensor (X3) detects a part and the robot has returned to Starting point (X5), the next part is
supplied.
In order to repeat operation checks, the screen should be initialized by clicking the [Reset] button on the
remote control.