It didn't connect the server.I need help!

[panyunyi]

Hello,sorry to bother you! I really need some help.

modscan32 is worked in this config.But jsmodbus didn't work.

[panyunyi]

[stefanpoeter]

Are you sure you connect to the right port and ip address? The timeout can be from the tcp connection since you have set auto reconnect to true.

[panyunyi]

Yes,I'm sure connect to the right port and ip address.The first picture is modscan.They have the same config.

[stefanpoeter]

Can you post the code here, so that I can reproduce.

[panyunyi]

var modbus = require('jsmodbus');

// create a modbus client var client = modbus.client.tcp.complete({ 'host' : '192.168.1.8', 'port' : 10000, 'autoReconnect' : false, 'reconnectTimeout' : 1000, 'timeout' : 5000, 'unitId' : 1 });

client.connect();

// reconnect with client.reconnect()

client.on('connect', function () {

client.readInputRegisters(2, 10).then(function (resp) {

    // resp will look like { fc: 4, byteCount: 20, register: [ values 0 - 10 ], payload: <Buffer> }
    console.log(resp);

}, console.error);

});

client.on('error', function (err) {

console.log(err);

})

[stefanpoeter]

The best way to solve these kind of problems is to do it step by step. Try the code below. There are no modbus requests, just the connection. I would bet that this fails. If so, check your server and firewall settings.

var modbus = require('jsmodbus');

// create a modbus client
var client = modbus.client.tcp.complete({
    'host' : '192.168.1.8',
    'port' : 10000,
    'autoReconnect' : false,
    'reconnectTimeout' : 1000,
    'timeout' : 5000,
    'unitId' : 1
});

client.connect();

client.on('connect', function () {
    console.log("Connected!");
});

client.on('error', function (err) {
    console.log("Connection error!", err);
})

[panyunyi]

OK!Thank you for your patience.I will try.

[panyunyi]

Hi...It's connected.But the readInputRegisters didn't work.I think it maybe the response code is wrong. The right code is: 0000 0000 0006 0104 0001 0014 How should I modify the demo code to success?

[panyunyi]

It's worked!Thank you!