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ModbusPal is a project to develop a PC-based Modbus simulator. Its goal is to reproduce a realistic environment, with many slaves and animated register values. Almost everything in ModbusPal can be customized and controlled by scripts.
FactoryController testing/verification tool. Simulate MODBUS-TCP industrial network with set of devices.
Update 2017: Hardware Emulator project has been integrated to main FactoryController codebase and this repository is obsolete.
A C# written application that simulates MODBUS devices in their serial ASCII, serial RTU and TCP communication modes. It uses NModbus libraries for message passing; mono framework and Gtk# bindings for the multi-platform GUI.