Siemens S7-300 / 400PLC a programming class, explaining the Siemens S7-300 PLC hardware allocation and address assignment 2, commonly used to explain the Siemens S7-300 PLC module 3, to explain the expansion of Siemens S7-300 PLC and address assignment 4, programming software The installation and use of 5, the hardware configuration 6, 7 using the symbol defined variables to create a program in OB1 8, 9 module parameter settings, explain the Siemens S7-300 PLC system storage and data types 10, Detailed Siemens S7-300 PLC Ladder Instruction 11, PLC 12 addressing modes, Siemens S7-300 PLC bit logic, timers, counters, data processing, process control instruction 13, program structure Siemens S7-300 / 400 PLC 14 Detailed Siemens S7- 300/400 PLC communication practical operation of 15, 16 debug communications networking, programming, monitoring 17, the input and output parameters of function blocks 18, 19 analog and closed-loop control, network bus 20, 21 fieldbus and industrial Ethernet 22, works Case explain and strengthen practice and training