publicbyteExceptionCode {get; } publicModbusException(byteexceptionCode) :base($"Modbus exception: {GetExceptionMessage(exceptionCode)}") { ExceptionCode = exceptionCode; } privatestaticstringGetExceptionMessage(bytecode) { returncodeswitch { 0x01 =>"Illegal function", 0x02 =>"Illegal data address...
Modbus由MODICON公司于1979年开发,是一种工业现场总线协议标准。1996年施耐德公司推出基于以太网TCP/IP的Modbus协议:ModbusTCP。 Modbus协议是一项应用层报文传输协议,包括ASCII、RTU、TCP三种报文类型。 标准的Modbus协议物理层接口有RS232、RS422、RS485和以太网接口,采用master/slave方式通信。 Modbus和RS485的关系:Modb...
18 /*判断功能码是否有误*/ 19 FunctionCode fuctionCode=(FunctionCode)recievedMessage[1]; 20 if (CheckFunctionCode(fuctionCode) != MB_OK) 21 { 22 return; 23 } 24 25 /*校验接收到的信息是否有错*/ 26 uint16_t byteCount=recievedMessage[2]; 27 bool chechMessageNoError=CheckRTUMessageIntegr...
3 uint8_t unitID; 4 FunctionCode functionCode; 5 uint16_t startingAddress; 6 uint16_t quantity; 7 }ObjAccessInfo; 1. 2. 3. 4. 5. 6. 7. 2.2、怎么解析数据响应 对于数据响应,我们同样不需要考虑全部的操作码,我们一般需要考虑读请求的响应,因为他们的数据需要解析。而对于写请求返回数响应只是...
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Function code 1 0x83 Exception code 1 See 6.3.2 .6.3.3.4 Examples This section takes the Modbus-TCP communications frames as an example. The differences between Modbus-RTU and Modbus-TCP lie in the additional address field and the CRC. Pay attention to the differences when using the Modbus-...
{15return;16}1718/*判断功能码是否有误*/19FunctionCode fuctionCode=(FunctionCode)recievedMessage[1];20if(CheckFunctionCode(fuctionCode) != MB_OK)21{22return;23}2425/*校验接收到的信息是否有错*/26uint16_tbyteCount=recievedMessage[2];27boolchechMessageNoError=CheckRTUMessageIntegrity(recieved...
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IO.Ports; namespace ModbusRtu { public partial class Form1 : Form { private static IModbusMaster master; private static SerialPort port; //写线圈或写寄存器数组 private bool[] coilsBuffer; private ushort[] registerBuffer; //功能码 private string functionCode; //参数(分别为站号,起始地址,长度...
Page 11 MPM, APM, PPM, & LTI Series Modbus® Register Tables Serial Communication Register 1 Number Address (hex) Name Access Limits or Range 2 Units Data Type 3 Function Code(s) Comments 40136 40137 40138 40139 40140 – 40141 40142 – 40143 40144 – 40145 40146 40147 – 40148 40149 ...