西门子PLC通信开源库

Snap7

http://snap7.sourceforge.net

Snap7 is an open source, 32/64 bit, multi-platform Ethernet communication suite for interfacing natively with Siemens S7 PLCs. The new CPUs 1200/1500, the old S7200, the small LOGO 0BA7/0BA8 and SINAMICS Drives are also partially supported.

跨平台

NetToPLCSim

https://sourceforge.net/projects/nettoplcsim/

PLC模拟器辅助工具

TCP/IP-Network extension for the PLC simulation software Siemens PLCSim (Step 7 V5.4/5.5). With NetToPLCSim you are able to simulate e.g. SCADA systems over Network in combination with your simulated PLC.

s7netplus

https://github.com/S7NetPlus/s7netplus

S7.NET+ -- A .NET library to connect to Siemens Step7 devices

C#

LIBNODAVE

http://libnodave.sourceforge.net/

https://github.com/netdata-be/libnodave

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