The significance of PLC CAN bus communication lies in improving the stability and safety of PLC operation, as CAN bus can be considered one of the most stable types of fieldbus.
CAN bus, also known as Controller Area Network, was developed by Bosch in Germany. It was initially used in automobiles and later expanded to various industrial control projects. Compared with other types of industrial fieldbuses, CAN bus has the following advantages:
1. CANBUS has a higher data transmission speed than traditional wiring methods.
2. CANBUS saves wiring harness and reduces vehicle weight compared to traditional wiring methods, while optimizing the wiring of the vehicle body.
3. One of the control units connected to CANBUS has malfunctioned, but the other control units can still send their own data without affecting each other.
4. The CAN data bus is a dual line system. If one of the lines fails, the CAN system will switch to a single line operation mode, which improves the stability of the entire vehicle.
5. The double wires of the CAN system are wound together like "Fried Dough Twists" in practice, which can effectively prevent the interference and outward radiation of electromagnetic waves.
We saw the advantages of CANBUS and integrated 1 to 2 CAN bus interfaces into our PLC, so that the PLC can communicate through both Modbus bus and CANopen bus.
In addition, our PLC is divided into integrated design and modular design, with stronger scalability. The device supports all types of programming languages, so you won't get stuck in the dilemma of choosing.