Mitsubishi PLC English name is also known as: Mitsubishi Programmable Logic Controller, is the main product of Mitsubishi Electric in Dalian. It uses a class of programmable memory for its internal memory program, performing user-oriented instructions such as logic operations, sequence control, timing, counting, and arithmetic operations, and controlling various types of machinery through digital or analog input/output. Or the production process. Mitsubishi PLC has the following models commonly found in the Chinese market: FR-FX1N FR-FX1S FR-FX2N FR-FX3U FR-FX2NC FR-A FR-Q).
The programmable controllers produced by SIEMENS in Germany are also widely used in China, and are used in metallurgy, chemical and printing production lines. Siemens (SIEMENS) PLC products include LOGO, S7-200, S7-1200, S7-300, S7-400 and so on. Siemens S7 series PLC is small in size, fast in speed and standardized, with network communication capability, stronger function and high reliability. S7 series PLC products can be divided into micro PLC (such as S7-200), PLC with small-scale performance requirements (such as S7-300) and PLC with medium and high performance requirements (such as S7-400).
First of all, their programming philosophy is different. Mitsubishi plc is a Japanese brand. The programming is intuitive and easy to understand. It is easier to learn. Siemens plc is a German brand. The instructions are more abstract, and the learning is more difficult, but the instructions are less, and Mitsubishi's instructions are more More, so learning Mitsubishi and learning Siemens cycle is the same;
Mitsubishi's advantages are discrete control and motion control. Mitsubishi's instructions are rich, with dedicated positioning commands, control servos and stepping are easy to implement. To achieve some complex motion control is also Mitsubishi's strength, and Siemens is weaker in this block. There is no special instruction. It is not impossible to do servo or step positioning control, but the program is complicated and the control precision is not high.
Process control and communication control Siemens is a strong point. Siemens' analog modules are cheap and simple, while Mitsubishi's analog modules are expensive and complicated, Siemens is easy to communicate, and the program is simple. Mitsubishi is weak in this function.
Therefore, for different control methods of different equipment, we must rationally choose PLC, use its strengths and avoid its shortcomings.
For example, a device is just some motion control, such as a robot, you can choose Mitsubishi's PLC, a device has servo or stepping to perform positioning control, and also chooses Mitsubishi PLC; there are many simulations like central air conditioning, sewage treatment, temperature control, etc. It is necessary to select Siemens PLC for the quantity to be processed. There is a lot of instrument data on a certain equipment site to be collected by communication, and Siemens is well controlled.
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