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...
在点击信封图标，打开Modbus从站参数窗口：默认从站地址222，例子设定为8号站;然后在设定modubs从站的FunctionCode地址与PLC中M，I，Q等地址的对应关系：例子设定的参数含义是Modbus主站读从站的前256个位（00000-00255）对应S7300站中MB100-MB131中的数据. FunctionCode说明: FunctionCode01，05，15对应M，Q，T，...
publicModbusException(byteexceptionCode) :base($"Modbus exception: {GetExceptionMessage(exceptionCode)}") { ExceptionCode = exceptionCode; } privatestaticstringGetExceptionMessage(bytecode) { returncodeswitch { 0x01 =>"Illegal function", 0x02 =>"Illegal data address", 0x03 =>"Illegal data value...
1 package test; 2 3 import java.io.IOException; 4 import java.io.InputStream; 5 import java.io.OutputStream; 6 import java.nio.charset.StandardCharsets; 7 import java.util.Enumeration; 8 import java.util.TooManyListenersException; 9 10 import com.serotonin.io.serial.SerialPortException; 11 ...
response[0] = 0x10;// Function code Array.Copy(pdu, 1, response, 1, 4);// Echo address and quantity returnBuildResponse(transactionId, unitId, response); } } privatebyte[] BuildResponse(ushorttransactionId,byteunitId,byte[] pdu)
I see that the package is sended, but the slave response causes an exception '[inputs.modbus] Error in plugin: modbus: exception '2' (illegal data address), function '131' I was just asking for a 'non-standard' flag, which other users above in this thread have suggested to be merged...
一是:Function列表框选择功能中的0x~4x,表示的是存储区0区、1区、3区、4区 输出线圈 输入线圈 保持寄存器 输入寄存器 Modbus协议规定了4个存储区 分别是0、1、3、4区 其中0区和4区是可读可写,1区和3区是只读。 二是:Address项,这里需要特别强调一下,Address表示Modbus寄存器地址,其取值范围与设备寄存器地址...
126 + /// <param name="functionCode"></param> 127 + /// <returns></returns> 128 + Result<bool> ReadDiscrete(string address, byte stationNumber = 1, byte functionCode = 2); 129 + #endregion 130 + 131 + #region Write 写入 132 + /// <summary> 133 + /// 线圈写入...
usage Application port can emulate Modbus master or slave device Supports Enron version of Modbus protocol for floating point data transactions Slave Specifications The MVI94-MCM accepts Modbus function code commands of 1, 2, 3, 4, 5, 6, 15 and 16 from an attached Modbus master ...
{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...