modbus-tcp

问题 how to read modbus TCP holding values (03) - 32bit float word swap (CD AB) with node red function block ? I have problem with modbus... Reading from modbus TCP ( FC3 , data size 32 bit Float, address 272 decimal)... When Node RED read values ( FC 3, read holding registers, quantity 2 ) returns values like [0,16833] ... Here I'm using msg.payload=msg.payload[1] in function to get value 16833 out from array... This is my temperature sensor value.. To see if modbus address is correct I'm using

问题 About the Code I am using EasyModbus Nuget in C# Window Form Application. I am trying to fetch the changed Holding Register's Address Value through RTU(Real Time Update) using ModbusServer . Below code connect to server. void Connect() { ModbusClient client = null; client = new ModbusClient("IP Address", 502); client.Connect(); } Below code fetches the value of address given below Holding Register. client.ReadHoldingRegisters(10001, 1); So far, everything works perfectly. I was reading about

问题 About the Code I am using EasyModbus Nuget in C# Window Form Application. I am trying to fetch the changed Holding Register's Address Value through RTU(Real Time Update) using ModbusServer . Below code connect to server. void Connect() { ModbusClient client = null; client = new ModbusClient("IP Address", 502); client.Connect(); } Below code fetches the value of address given below Holding Register. client.ReadHoldingRegisters(10001, 1); So far, everything works perfectly. I was reading about

问题 I am using for J2Mod java jar for my project. I am connected with the device through comport but, neither able to read nor write data into the device. Both time when I am trying to read or write data into the device getting the same exception. Whenever, Using QModMaster I am able to read data from the devices. Connection Code - SerialParameters parameters; SerialConnection serialMaster; try { parameters = new SerialParameters(); parameters.setPortName((String) jComboBox4.getSelectedItem()); /

问题 I am using for J2Mod java jar for my project. I am connected with the device through comport but, neither able to read nor write data into the device. Both time when I am trying to read or write data into the device getting the same exception. Whenever, Using QModMaster I am able to read data from the devices. Connection Code - SerialParameters parameters; SerialConnection serialMaster; try { parameters = new SerialParameters(); parameters.setPortName((String) jComboBox4.getSelectedItem()); /

问题 The connection has been established to modbus simulator but I am trying to read the register values from simulator and write it on console but not able to do. this code creates the connection successfully to modbus simulator but contains the syntax of reading the register values i.e requesting for register values and also response about the same but unable to fetch the register values. I tried initializing the register values and also the range but the code isn't working either. Below is the

问题 Description and code: I'm using the Synchronous ModbusTcpServer with pymodbus library to create a Modbus Slave/Server, that here's the code: from pymodbus.server.sync import StartTcpServer, ModbusTcpServer from pymodbus.device import ModbusDeviceIdentification from pymodbus.datastore import ModbusSequentialDataBlock from pymodbus.datastore import ModbusSlaveContext, ModbusServerContext from twisted.internet.task import LoopingCall from twisted.internet import reactor import threading import

问题 Description and code: I'm using the Synchronous ModbusTcpServer with pymodbus library to create a Modbus Slave/Server, that here's the code: from pymodbus.server.sync import StartTcpServer, ModbusTcpServer from pymodbus.device import ModbusDeviceIdentification from pymodbus.datastore import ModbusSequentialDataBlock from pymodbus.datastore import ModbusSlaveContext, ModbusServerContext from twisted.internet.task import LoopingCall from twisted.internet import reactor import threading import

问题 Description and code: I'm using the Synchronous ModbusTcpServer with pymodbus library to create a Modbus Slave/Server, that here's the code: from pymodbus.server.sync import StartTcpServer, ModbusTcpServer from pymodbus.device import ModbusDeviceIdentification from pymodbus.datastore import ModbusSequentialDataBlock from pymodbus.datastore import ModbusSlaveContext, ModbusServerContext from twisted.internet.task import LoopingCall from twisted.internet import reactor import threading import

问题 Can anyone explain how to create the request and get the response in right way using pymodbus via Modbus TCP/IP? I have the PLC wich I want to use as slave and PC - as master. I trying to do it in such way: from pymodbus.client.sync import ModbusTcpClient host = '192.168.56.9' port = 502 client = ModbusTcpClient(host, port) client.connect() #Register address 0x102A (4138dec) with a word count of 1 #Value - MODBUS/TCP Connections #Access - Read #Description - Number of TCP connections request