Arduino Modbus TCP/IP

[the_grim]

Próbuję zastosować arduino uno rev3 jako slave wykorzystując protokół modbus TCP/IP, na komputerze mam symulator mastera. Używam ethernet shield w5100. W symulatorze mastera dostaję komunikat timeout.

#include <SPI.h>
#include <Ethernet.h>
#include <ArduinoRS485.h> // ArduinoModbus depends on the ArduinoRS485 library
#include <ArduinoModbus.h>

// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network.
// gateway and subnet are optional:
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192, 168, 100, 100);
IPAddress myDns(192, 168, 1, 1);
IPAddress gateway(192, 168, 100, 1);
IPAddress subnet(255, 255, 255, 0);

EthernetServer server(502);
ModbusTCPServer modbusTCPServer;

void setup() {
  // initialize the ethernet device
  Ethernet.begin(mac, ip);

  // Open serial communications and wait for port to open:
  Serial.begin(9600);
   while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  // Check for Ethernet hardware present
  if (Ethernet.hardwareStatus() == EthernetNoHardware) {
    Serial.println("Ethernet shield was not found.  Sorry, can't run without hardware. :(");
    while (true) {
      delay(1); // do nothing, no point running without Ethernet hardware
    }
  }
  if (Ethernet.linkStatus() == LinkOFF) {
    Serial.println("Ethernet cable is not connected.");
  }

  // start listening for clients
  server.begin();

  Serial.print("Modbus server address:");
  Serial.println(Ethernet.localIP());
  // start the Modbus TCP server
  if (!modbusTCPServer.begin()) {
    Serial.println("Failed to start Modbus TCP Server!");
    while (1);
  }

  // configure the LED
  pinMode(5, OUTPUT);
  digitalWrite(5, HIGH);

  // configure a single coil at address 0x00
  modbusTCPServer.configureCoils(0x00, 10);
  modbusTCPServer.configureDiscreteInputs(0x00, 10);
  modbusTCPServer.configureHoldingRegisters(0x00, 10);
  modbusTCPServer.configureInputRegisters(0x00, 10);

}

void loop() {
  // wait for a new client:
  EthernetClient client = server.available();

  // when the client sends the first byte, say hello:
  if (client) {
    // a new client connected
    Serial.println("new client");

    // let the Modbus TCP accept the connection
    modbusTCPServer.accept(client);

    while (client.connected()) {
      // poll for Modbus TCP requests, while client connected
      modbusTCPServer.poll();
      
    }

    Serial.println("client disconnected");
  }
}

 

Edytowano Luty 26, 2021 przez the_grim