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In the field of today's architectural automation, MSTP and IP are both very important. Speaking of MSTP, let’s talk about it first. MSTP is actually a standard extended to the RS-485 serial link in the protocol. It is mainly running on the RS-485 serial bus! Through this serial bus, various terminal devices can communicate with each other

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Then, let’s talk about IP, which is an extension of Internet protocol support, which is equivalent to extending communication to a TCP/IP-based local area network including wide area network environment! Using this IP protocol can be easier and better integrated.

Communication comparison

The first thing to talk about communication speed is that this is wire-based MSTP. In theory, the communication rate is only 115.2 Kbps, and the limits of a series of factors such as links, the number of connected nodes, etc. In fact, the real actual transmission rate is much lower than the theoretical rate. In comparison, IP has a very obvious advantage in communication speed. For example, we are now commonly used for 10M/100M adaptive devices, and even Gigabit Ethernet, which greatly improves the actual communication rate.

The second one is about connectivity

Let’s talk about MSTP from the hardware connection point of view, only line 2 is needed. For example, RTU requires two differential data lines, but its entire connection link is relatively single and the hierarchical structure is relatively fixed. There are certain limitations in network flexibility. Once a node breaks the connection below, there may be problems. However, IP can build various mesh structures, and it is relatively easy to add and delete nodes, which can greatly improve the flexibility of the system network!

The third talks about functional characteristics

The functions of MSTP are mainly based on basic control of equipment and simple status display, etc. The main function is to conduct the most basic monitoring and regulation of equipment, and the implemented functions are relatively limited. But on the other hand, IP uses the architecture it carries with the great advantage of the LAN. It can not only handle various complex specifications, including reading and writing data attributes, information notifications, etc., a series of diverse tasks, but also supports remote device maintenance and system management functions!

Everyone must have these questions:

Q1. What kind of scenario is MSTP device suitable for?

A: In some small buildings with not so large scale and simple scale, such as a three or four-story ordinary office building, the communication rate requirements are not particularly high, but the equipment is simple and easy to operate, and the data volume is relatively small. At this time, MSTP can well support the corresponding equipment in it for basic management!

Q2: Is IP preliminary construction and installation highly complex?

A: It involves the architecture layout related to TCP/IP that we are familiar with now, such as network equipment settings such as routers and switches, so the complexity of the early installation and construction is relatively high compared to MSTA. However, when the installation and debugging are complete, you can enjoy many good advantages such as flexible scalability, so it is also worth deploying such a network.

Q3: How to upgrade MSTP to IP

Devices like the existing BAC net MSTP device network can be added to the existing BAC net MSTP device network. Through such a bridged device, the original MSTP network can be extended to the BAC net IP network and can also be combined with traditional old systems and enjoy modern IP communication capabilities to upgrade the architecture. In this architecture, the interaction between devices will be smoother, which will slowly make up for the shortcomings in the previous MSTP system and reduce the high overall investment in new systems.

I personally think that BAC net MSTP still has some small coincidences that are applicable and not so complicated and convenient to deploy. However, in terms of practicality and scalability, the functional coverage and long-term performance of BAC net IP are obviously outstanding. If it is a newly built, relatively large-scale construction project, it is more suitable for selection. These are enough for everyone to consider what methods to apply to different scenarios. )