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In 2010, I reprogrammed the S7-200 emulator according to the manufacturer's specifications. The special feature I've added to it is the ability to connect to WinCC over the OPC protocol.
Support: andrewpham.freelancer@gmail.com, live:andrewpham.freelancer, telegram:andrewphamvn
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Petri-LLD is a graphical development environment for real-time automation control and is written in Java. It is based on a form of Petri net, and compiles to a number of programmable logic controller (PLC) languages as well as Java and Visual Basic.
Simulator for Siemens S7-200 PLC. It supports boolean operations, counters, timers, rise up and fall down contacts, and mathematics operations, with integer and real numbers, like sin, cos, tan. Comments and advise are well accepted!
Based on WSH, OLE, and other MS Windows technologyes - tool for simple simulate PLC with ModBus, for PLC and SCADA developers.
Moved to https://code.google.com/p/plcsimulator/