2012 | OriginalPaper | Chapter
Messages Analysis of Siemens PPI Protocol Data Mixed Storage Area Based on Messages Interception
Authors : Wenjie Feng, Wanli Li, Zhenzhen Li
Published in: Practical Applications of Intelligent Systems
Publisher: Springer Berlin Heidelberg
Activate our intelligent search to find suitable subject content or patents.
Select sections of text to find matching patents with Artificial Intelligence. powered by
Select sections of text to find additional relevant content using AI-assisted search. powered by
PPI protocol is a communication protocol specially designed for S7-200 system by Siemens. PPI protocol makes read and write operations directly to the PLC without having to program, but the PPI protocol is not opened by Siemens. Refer to IEC 61158-4-3 standard and define the communication process and messages basic format of PPI protocol. By the way of intercepting messages, intercept PPI protocol messages between STEP 7-Micro/WIN and S7-200 PLC communication. According to the intercepted messages, refer Profibus fieldbus data link protocol format and analyze the data mixed storage messages format of PPI protocol and the result can be used in communication between upper computer, field device and PLC.