Question about plc module with network port
PLC is a programmable automation equipment controller. Nowadays, those automated production lines in the factory are basically controlled by it. Otherwise, do you think it is manually operated? Because the content of real-time control can be changed, PLC is more flexible than traditional relay controllers, reducing application costs and facilitating later maintenance. It will also play a role in the future development of industrial automation. An increasing role. Today, we will talk about a few questions about the PLC module with a network port. I hope it can help you.
Question 1: Do all PLC devices have network ports?
Answer: Basically, they all have network ports, but we can’t say that they are too full. In case there is any manufacturer that produces one without it? However, the network port is indeed one of the standard communication interfaces for PLC devices, and there is also a serial interface that is generally used to connect to the 485 serial bus. However, as our requirements for PLC communication continue to increase, many manufacturers have now developed PLCs with CAN bus interface that can directly use CAN bus communication, which is really a powerful combination.
Question 2: Can all PLC modules with network ports expand IO chips?
Answer: This depends on the design idea of your device. Some manufacturers like to integrate all the IO interfaces directly into the main control head, that is, the main control and IO are a whole, and the whole cannot be separated. It must be impossible to install IO tablets. Similarly, some manufacturers have thought of the concept of combined utilization from the beginning, the device master control, IO and everything are independent, when the device is applied, it is completely combined according to their own needs, and the flexibility is higher. This should also be the future PLC. A trend of development, large warships have begun to be built modularly, not to mention your little PLC?
Question 3: If it is a kind of expandable IO chip with network port plc, does each IO on it need to be connected separately for power supply?
Answer: Of course not. The power supply of these IOs only needs to be provided by the main control they are connected to. No separate power supply is required for each IO. Otherwise, there are so many lines. It seems that the sloppy, there is the possibility of mutual interference, maintenance is all Tired of individuals. But at the same time, you also need to know that the withstand voltage of the PLC main control is limited, which also means that it is impossible to connect IO chips with no limit, generally two or thirty is the limit, otherwise power support is a problem, although We can also solve it through other methods, but the PLC is after all placed in the cabinet, too long and too unrealistic, two or thirty IO is generally enough.
In order to meet everyone's needs for PLC modules with network ports, Shenyang Guangcheng Technology also introduced its own CAN bus interface, which can freely expand the IO chip PLC, that is, GCAN-PLC series. Shenyang Guangcheng Technology GCAN-PLC series PLC module with network port is composed of a programmable main control module (GCAN-PLC-400), several GC series IO modules (GC-1008, GC-3804, etc.) and a terminal terminal module. . The GCAN-PLC-400 main control module can be connected to all GC series IO modules. Users can choose to expand IO modules according to the actual needs of the site. The number of expansion IO modules can reach 32. The GCAN-PLC-400 main control module supports automatic configuration. The user does not need to set parameters on the PC. The main control module will be automatically configured according to the front and rear positions of the inserted terminal module.
