Modbus TCP, Modbus UDP and Modbus RTU client/server library for .NET
Industry approved!!
Fast and secure access from PC or Embedded Systems to many PLC-Systems and other components for industry automation.
Only a few lines of codes are needed to read or write data from or to a PLC.

Additional Software tools e.g. Modbus Server Simulator, makes software development fast and easy.

Download Library (*.DLL) from NuGet or from:

Supported Function Codes:

• Read Coils (FC1)
• Read Discrete Inputs (FC2)
• Read Holding Registers (FC3)
• Read Input Registers (FC4)
• Write Single Coil (FC5)
• Write Single Register (FC6)
• Write Multiple Coils (FC15)
• Write Multiple Registers (FC16)
• Read/Write Multiple Registers (FC23)

Modbus TCP, Modbus UDP and Modbus RTU client/server library

Poll主机 2023-6-27：修复NumberOfRetries无效错误 if (NumberOfRetries > countRetries) 2023-6-27：修复TCP连接断线无法触发ConnectedChanged的问题 2020-8-15：增加响应延时属性ResposeDelay 事件ResposeDelayChanged 2020-8-11：修正Modbus主机模式下退出报不能为Null异常错误 详见:~ModbusClient() 2020-8-11：修正UDP连接connected属性一直为True的问题 2020-8-2：规范化ReceiveDataChanged(Byte[] data) SendDataChanged(Byte[] data)回调 2020-8-1：增加ModbusType 规范化编程 2020-8-1：增加UDP模式发送回传（全模式支持发送、接收通信数据回传） 2020-7-31：修正Modbus主机模式下连接超时 详见:connectTimeout

Client从机 2023-6-29：删除numberOfClientsChanged、NumberOfConnectedClientsChanged事件 2020-8-13：解决ModbusUDP无法二次启动问题 关闭未结束线程 listenerThread 2020-8-2：增加ReceiveDataChanged(Byte[] data) SendDataChanged(Byte[] data)回调 2020-8-2：解决从机模式接收数据debug信息全部为00的问题 2020-8-1：增加ModbusType 规范化编程 2020-8-1：解决UDP从机模式关闭后不能打开的问题 2020-7-30：解决ModbusRTU从机模式下数据接收错误的问题 详见:SerialHandler

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