RBE202TC – Programmable Logic Controllers and Network Communications
Laboratory 2 (60%)
Creating a Three-Axis Servo Control System
In this assignment, you are required to develop a three-axis servo control system based on a PLC. This system will utilize the PLC and ACOPOSmicro drive system manufactured by B&R. The actuators to be used are the synchronous motors with part number 8LVA13 .R0030D000-0, accompanied by the corresponding inverter module, which has the part number 80VD100PD.C022-01. For the controller, you will use the X20 system, with the part number X20CP1382.
Figures 1(a) and (b) provide illustrations of the B&R PLC and the ACOPOSmicro drive system, respectively. Instead of implementing a traditional HMI display, you are to design an HMI interface that can be operated through an internet browser on a PC for the control system.
The basic control requirements for the three-axis servo control system are outlined below:
1. Power On/Off: Ability to power the servo motors on and off.
2. Homing: Capability to return each axis to its home position.
3. Manual Motion of Three Axes: Function to jog the axes in both forward and reverse directions.
4. Automatic Motion of Three Axes: Ability to move and stop all axes simultaneously based on a user-defined reference signal.
Additionally, for your HMI (Human-Machine Interface) screen, it should include these basic functions in conjunction with the ones listed above.
1. Display the angular speed of the servo motors
2. Display the angular position of the servo motors
You are to use Automation Studio to program and simulate your servo control system.
Individual Report (50%):
Please complete the following tasks and report your findings in a technical report:
1. Design and Sketch the Electrical Circuit Schematic Diagram: Create a schematic diagram for your PLC-based servo control system. Clearly indicate the different parts of the circuit, such as the power circuit and control circuit. Describe the working principle of your circuit, including any protection mechanisms incorporated.
2. Detail the I/O Allocation for the PLC: Create a table outlining the I/O allocation for the PLC. Based on your I/O allocation and schematic diagram, write a Structured Text (ST) program and describe its functionality.
3. Design an HMI Screen for Your Control System: Develop a design for an HMI screen relevant to your control system and write the associated program. Describe the features of your HMI screen and explain the functionality of its program.
4. Simulate Your ST Program and HMI Screen Using Automation Studio: Describe your hardware configuration and detail the key steps taken during the simulation of your ST program and HMI screen. Report the results of your simulation.
Your report should comprise, but not limited to, the following sections.
• Title page
• Summary
• Introduction
• Design
• Results and discussion
• Conclusion
• References
• Appendix
Submission requirements
Deadline: 11th May 2025, 23:59
Length of report: Maximum of 1500 words not including figures and references Mode of
submission: In Word or PDF, online submission via Learning Mall
Lab Demonstration (10%):
You will need to demonstrate your work near the end of the module. You will be divided into separate sessions for this purpose. The demonstration schedule will be published during the semester, so please make sure to note your specific session date and time. The lab demonstration will be assessed by the module leader. If you fail to attend your demonstration, you will receive a mark of zero for this part of the assessment.
Your demonstration at the PLC lab should include, but not limited to, the following items.
i. The hardware configuration and schematic diagram for your PLC based servo control system.
ii. Your ST program.
iii. Your HMI screen.
iv. The key steps for simulation and the corresponding simulation results.
The demonstrations will proceed according to the name list in each session. Therefore, first named person in each session will start and progress down the list. Students will be given 15 minutes for their demonstration.