Why is the implementation mode of "TCP/IP Converter +485 controller "" Fake TCP/IP access control "?

There's a fake TCP/IP access control system out there right now. It is realized by using ordinary 485/232 access control +TCP/IP converter. This implementation mode, it can be said that all access control systems on the market can be networked in this way to achieve access control within the local area network, in fact, this is just a fake TCP/IP implementation mode, just a converter company's sales of a product under the guise of a specific analysis.

This implementation is to install a TCP/IP converter to convert 485 and 232 serial port signals into TCP/IP mode through the LAN transmission to the computer, the computer needs to install a TCP/IP converter driver, the TCP/IP model into a virtual serial port signal, the original access control software does not need to change, only need to operate the virtual serial port.

This method seems to be achievable in principle, and it seems to be able to pass the test, but there are actually the following hidden dangers. This conversion has a certain delay in software and hardware, and it may not be possible to communicate when the communication speed is high or the access control command is long. This kind of communication quality and communication delay, is not suitable for internet wide area network data communication.

If the load of access controller equipment more than a few, it may be unbearable, that is, there is a small number of load problems, in the larger access control system can not be implemented.

Virtual serial port is a very unstable software state, once the background of the virtual program running problems, or unintentionally did not run, access control software can not communicate with the access control system.

TCP/IP converter is a universal device, and each access control manufacturer's communication format is different, so there is a compatibility problem, the same TCP/IP converter for a access control system is not a big problem, but there may be a compatibility problem for another access control system. The converter company will never individually design the products of an access control company. At the same time, the access control company generally tests it, feels that it can be used, and pushes it to the customer, which is very irresponsible. Good compatibility between two products can only be obtained through a lot of testing, local modifications and adjustments, and a lot of market feedback.

Therefore, this implementation method is only suitable for the original 485/232 access control system to be easily transformed into local area network access control, and the number of access control points can not be too much, the author does not recommend that you do so, because the instability will increase more trouble.

So what is the real TCP/IP network access controller?

There are several features for your reference:

Access to the network RJ45 port, directly on the controller motherboard. No need to install third party drivers.

This true sense of the network controller can achieve: access control and management within the LAN and enterprise network.

Internet without fixed IP address Access control and management of the Internet.