Discuss CAN232MB converter
The reason why the CAN232MB converter appears is that the function of the serial bus has become more and more unable to meet our current industrial control needs, and the need for a better CAN bus to replace and ban.
1. In terms of data transmission distance, the CAN bus can achieve data transmission up to ten kilometers without the help of additional data relays. The 485 bus must be implemented by artificial enhancement. In this regard, CAN The bus is better.
2. Each connected node device on the CAN bus is a host, they can equally send or receive data, and the efficiency is extremely high, and the 485 bus uses a master and slave structure, only the host can send information, other The slave can only accept passively, which is better at a glance.
3. The CAN bus comes with a CRC detection mechanism, that is to say, a node on the bus sends a wrong data, then its CRC system will automatically send an error frame signal to tell other nodes on the bus not to receive. In addition, the CAN bus also has a self-locking function. When a certain node is completely problematic, it will lock itself and will not participate in the communication of the entire bus to avoid the collapse of the entire line. As for RS485, don’t you have this Such a good idea.
4. Because the 485 bus only solves the data flow in the physical layer and other aspects, there is no research on the deeper protocol layer, so if you want to develop a project that uses 485 as the bus, you must start from the beginning and study all fields. The CAN bus itself comes with all of them, saving a lot of things, not only to facilitate research, but also to facilitate later maintenance, it seems that you already know the gap between them.
From the above introduction, we can see that CAN replaces 485 is almost a historical necessity, but even if it has the ability to replace, it will take a certain amount of transition time, otherwise the replacement cost will be unbearable, which is why the serial port to CAN gateway appeared , Because it allows devices that originally only supported serial communication to use CAN bus communication! In order to meet the related needs of everyone, Shenyang Guangcheng Technology has also launched related equipment with independent intellectual property rights, and supports GCAN-207 for CAN bus and 232 data conversion, or 485 data and CAN data conversion. Below, let's take a brief look at it.
Shenyang Guangcheng Technology GCAN-207 type CAN232MB converter is a newly developed universal serial port-CAN conversion module of our company. Compared with the traditional conversion module, CANCOM not only further upgrades the hardware workmanship, but also adopts online conversion technology. That is, you can use software to configure its serial communication mode (232 or 485) without disassembling the jumper. In terms of functions, a new "format conversion" mode is added. With the CANCOM conversion module, PC, PLC or other serial networking devices can be easily connected to the CAN-BUS network to form a CAN-BUS for fieldbus laboratories, industrial control, intelligent communities, automotive electronics networks, etc. Control node for data processing, data collection, and data analysis in the field of BUS networks. It is a powerful tool for CAN-BUS product development and data analysis. At the same time, CANCOM has the characteristics of small size, easy installation, etc. It is a reliable assistant for engineering applications, project debugging and product development.
