Omron: CP 1, CP 1h, CPM 1A2AH2C, cqm1h.
Mitsubishi: FX 1N, FX2N, Q series
△:ES/EH/ES2/EH2 and so on.
1, ladder diagram programming: its advantages are vivid, intuitive and practical, and it is well known by the majority of electrical technicians. It is the main programming language of PLC.
2. Instruction statement table language: similar to mnemonic language in microcomputer, it is the most basic programming language of programmable controller. The so-called instruction statement table programming is to use one or several easy-to-remember characters to represent some operating functions of the programmable controller.
Each manufacturer uses different mnemonics, so the sentence forms written by the same ladder diagram are different. Statement is the basic unit of user program, and each control function is executed by user program with one or more statements. Each statement is an instruction that specifies how the CPU acts, and its function is the same as that of a microcomputer, while the statement of PLC is also composed of operation codes and operands, so its expression is similar to that of a microcomputer instruction.
3. A relatively new programming method. Its function is to express a sequential control process with a function diagram. As a step-by-step control language, SFC can control a control process and display the status of the process. The logic applied by users is divided into steps and conversion conditions, rather than a long ladder diagram program. The display of these steps and conversion conditions enables users to see what state the machine process is in at a given time.
Related extensions:
PLC programmable logic controller; Programmable controller; Programmable Logic Controller (PLC)