Introduce a professional can bus to RS-232 gateway

What is the CAN bus? It is the abbreviation of controller area network. As the name implies, it is a local control network. Different from the general Internet or LAN, can bus is a thorough industrial bus, which shows that it has some unique strengths, such as anti-interference ability. You know, the industrial construction environment is not as quiet as we are in the office. Excluding the rain, snow, wind, frost, cold and heat, some construction areas naturally have strong radiation or strong magnetic field. If the industrial bus system can not have strong anti-interference ability and is easily damaged under the external interference, it will not only delay the construction period, but also sometimes lead to the operation of related equipment disorder and other phenomena, which will bring life danger to the machine operators. In order to prevent this kind of accident, can bus adopts the way of twisted pair differential voltage data transmission, that is to say, there are two data wires between two nodes of CAN bus, one of them has a relatively large voltage value, we generally call it can high or can_h, and the voltage of the other wire is relatively low compared with the first one, we call it can low or can_l. Because of the difference between the high can and low can voltage, a voltage difference between them will promote the operation of can signal. Because the external interference can only make the voltage higher or lower, there will always be a voltage difference between them, so the CAN bus can continue to operate. However, if the interference is too severe and has exceeded the anti-interference capacity of CAN bus, the damage of CAN bus will also be damaged. However, it can be assured that even if the CAN bus is damaged, the node equipment on it will not randomly send the wrong data, causing further damage.

After that, we can simply say the serial bus. Generally speaking, it has RS232, RS485, RS422 and other types. There are great differences bet

ween serial bus and each other. RS232 is the earliest but also the most backward one. Compared with CAN bus, we can see the gap between them.

1. In terms of the fastest data transmission speed, the CAN bus is 1000kbps, and theRS232 bus is  less than 100kbps.

2. In the farthest distance of data transmission, the CAN bus can transmit the signal to a distance of ten thousand meters, while the RS232 bus can only transmit 50 meters.

3. In terms of the number of connectable node devices, a CAN bus can connect 110 nodes at the same time. These nodes are distributed along the bus line like bus stops, which is also the reason why can bus is called CAN-bus. What about the RS232 bus? It is single to single, that is to say, one RS232 bus can only control one node device. In terms of efficiency, the difference between the two sides is really not an order of magnitude.

4. Most importantly, RS232 does not have the strong anti-interference ability such as can bus, not only it does not, but also the more advanced RS485 and other serial bus, which is the most important reason why serial bus is gradually replaced by CAN bus.

The trend of CAN bus replacing all kinds of serial bus is irresistible, but the reality is that there are many users whose machines only support the old serial bus. If a one-time replacement is carried out, the time can't wait, the cost can't be paid and the existing production will be delayed. Therefore, the best solution is to let the existing old machine use the new can bus. For this reason, can bus to RS-232 gateway tool, which can transform can data and serial data, came into being, for example, gcan-207 can bus to RS-232 gateway tool of Shenyang Guangcheng technology.

The gcan-207 can bus to RS-232 gateway tool of Shenyang Guangcheng science and Technology Co., Ltd. is a new general-purpose serial port can conversion module developed by our company. Compared with the traditional conversion module, the gcan-207 can bus to RS-232 gateway tool not only upgrades its hardware work, but also adopts in-line conversion technology, that is, it can use software to configure its serial port communication mode (232 or 485) without dismantling. Machine jumper. In terms of function, "format conversion" mode is added. Gcan-207 can bus to RS-232 gateway tool is adopted. PC, PLC or other serial port networking equipment can be easily connected to CAN-bus network, forming control nodes for data processing, data collection and data analysis in the field of CAN-bus network, such as field bus Laboratory, industrial control, intelligent community, automobile electronic network, etc. It is a powerful tool for CAN-bus product development and data analysis. At the same time, gcan-207 can bus to RS-232 gateway tool has the characteristics of small size, convenient installation, etc. it is a reliable assistant for engineering application, project debugging and product development.