PLC programmable logic manipulators are the core part of industrial control. According to the number of I/O points of PLC, PLC can be divided into three categories: small PLC, medium and large. It is a digitally operated electronic device designed for industrial production. It uses a programmable memory to store programs, execute user-facing instructions such as logic operations, sequential manipulation, timing, counting, and arithmetic operations, and manipulate various types of machines or production processes through digital or analog inputs/outputs.
The number of input signals and output signals received by PLC is called input point and output point, referred to as I/O point, which is one of the important bases for selecting PLC. Generally speaking, when the PLC control system processes more I/O points, the more chaotic the control connection will be, the larger the program storage capacity required by the user, and more PLC instructions and other functions will be required.
1. Market position of small PLC:
1. Mall size
As far as the planning of small PLC shopping malls is concerned, thanks to the continuous increase in the demand for downstream industrial automation, the overall planning of PLC in China has increased agilely, and the growth rate of small planning is slightly higher than that of large and medium-sized planning. According to the data, in 2019, the domestic PLC shopping mall planning was about 11.3 billion yuan, a year-on-year decrease of 2%, of which the planning of small PLC shopping malls was 5.209 billion yuan, and the planning of medium and large PLC shopping malls was 6.051 billion yuan. In 2020, the shopping mall planning of small PLCs will be 6.34 billion yuan, an increase of 22% year-on-year.
2. Use the program structure
As a key part of industrial automation software, PLC is widely used in the downstream and has a wide demand. Small PLCs are mainly used in the downstream electronics and semiconductor manufacturing industry (13%), textile machinery (8%), battery manufacturing (5%), packaging machinery (5%), and tissue machinery (5%). With the continuous increase in downstream demand, China's PLC shopping mall planning is huge.
3. Mall structure
Small PLCs are mainly used in OEM shopping malls, and large and medium-sized PLCs are mainly used in project shopping malls. In order to improve production efficiency and expand profit margins, OEMs urgently need to improve the level of automation of machinery to change the current shopping mall format. As a typical control product, PLC is an important tool for OEMs to improve the level of mechanical automation. OEM shopping malls have also become the key use of PLC products, among which textile, packaging and machine tools occupy a large proportion of PLC shopping malls. Small or micro PLCs can now meet the control requirements of OEMs, so small PLCs are widely used in OEM shopping malls. Project shopping malls are usually in the fields of electric power, mining, metallurgy, etc., which require messy control capabilities and strong communication networking functions, so most of them use large and medium-sized PLCs.
Second, small PLC competition format
Domestic brands are developing quickly in the field of small PLCs. Generally speaking, in the field of large and medium-sized PLC, the technical barriers are high, and the product quality is linked to the stability and reliability of the user's automatic production of the whole factory, so customers are more inclined to foreign brand products. Siemens, Schneider, Rockwell, GE and other international brands. Entered China earlier, has rich professional experience, more comprehensive product line cover-up, and a wide range of professional use cases. In the field of small PLC, domestic brands are more cost-effective, and the price is relatively low under the premise that they can well meet the needs of small PLC target customers and small and medium-sized enterprises.
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