"PLC Wireless communication expert" Free sharing-plc200 Communication program Daquan

This is the "PLC wireless communication expert" Team for users to organize the 20 Siemens PLC200 Communication program examples. Can save project time for PLC programmer.

You just need to understand the s7-200 serial settings, and the basic knowledge of the Modbus protocol, reference to these programs can be completed between the PLC and PLC data exchange, can also be achieved between the PC and the PLC data communication, whether it is used VB,VC high-level language, or configuration software can be.

See below for document passwords.

　　The first part, s7-200 free Port Communication Example 12

PLC200 Free port communication mode is a user-controlled communication operation mode of the CPU, which can realize the user-defined communication protocol. In the white-port communication mode, the user realizes the serial communication between PLC and PLC, PC, MCU and so on by using the receiving complete interrupt, sending interrupt, sending instruction and receiving instruction in ladder diagram program.

　　The second part, s7-200 Modbus Communication Example 8

MODBUS was first advocated by Modicon (Modicon), a standard communication protocol used in electronic controllers. Through the Modbus protocol, the controller can communicate between each other, the controller through the network (for example, Ethernet) and other devices. At present, in the rs232/rs485 communication process, the control equipment produced by different manufacturers is widely adopted Modbus protocol into an industrial network for centralized monitoring. Siemens 200PLC supports Modbus RTU protocol, and the installation library file can realize Modbus communication.

　　

　　Part III, PLC200 and high-level language communication

　　　　Siemens PPI protocol VB original program

　　　　Siemens VB Communication Program

　　　　A S7200 through Opcserver and VC + + written on the host computer Communication Engineering example

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"PLC Wireless communication expert" Free sharing-plc200 Communication program Daquan