Looking for an affordable Arduino Opta alternative with free ladder-logic software
I am looking for an affordable PLC or industrial controller for teaching undergraduate control and automation laboratory classes.
I initially considered the Arduino Opta, but I have seen several negative comments about its limitations, especially the small number of built-in I/O points. I also understand that additional expansion modules may be required for functions such as PWM, which could significantly increase the cost when equipping several laboratory stations.
My main requirements are:
- Affordable hardware.
- Free ladder-logic programming software.
- Enough digital and analog I/O for control experiments.
- PWM or other suitable outputs for actuator control.
- PID control capabilities.
- Industrial communication options such as Modbus, Ethernet, or EtherCAT.
- Reliable hardware for repeated student use.
- Good documentation and reasonably priced expansion modules.
I have heard that the Kinco AK8X0 EtherCAT PLC may be a good option, but I have not found many detailed reviews from people using it in universities or teaching laboratories.
Has anyone used the Kinco AK8X0 or another Kinco PLC? I would appreciate feedback about:
- The ladder-programming software.
- Hardware and software reliability.
- Analog I/O and PID implementation.
- PWM or high-speed output capabilities.
- EtherCAT setup and compatibility.
- Documentation and technical support.
- Cost and availability of expansion modules.
- Suitability for student laboratory use.
I am also open to recommendations for other affordable PLCs that would work well for teaching ladder logic, PID control, data acquisition, actuator control, and industrial communications.