Siemens PLC A Fetch/write communication method based on TCP

Recently in the study of Siemens PLC superior industrial Control software communication, in addition to OPC server, Prodave two, to understand that Siemens Ethernet Communication template provides a Fetch/write communication based on TCP, this way without PLC side programming can get all the data in Plc, It can be used to exchange data with S7 device or PC, this article briefly introduces the way of usage.

See " Siemens PLC Implementation of the use of CP-based fetch write " http://www.ad.siemens.com.cn/download/docMessage.aspx?id=3218

Delphi, VB programming can use Sokect Direct communication with PLC, Siemens S7300 PLC Data processing (S7 address area:db, M, I, A, PI/PQ, C, T).

can refer to "Use Fetch/write way to realize PC machine and S7PLC direct communication" a article.