JavaScript

⚠️   This library is not perfect. Sometimes the returned values do not match with the requests if the communiction is fast.

 

Usage

Minimal init

<script src="mtecConnectModbus.js"></script>
<script>
    var pump = new mtecConnectModbus();

    async function connect() {
        await pump.connect();
     }
    
    async function start(){
        await (pump.speed = 20);
    }
    
    async function stop(){
        await pump.stop();
    }
</script>
<button onclick="connect()">Connect</button>
<button onclick="start()">Start</button>
<button onclick="stop()">Stop</button>

⚠️   Keep in mind:

• .connect() has to be triggered by user gesture (e.g. onclick)
• communication takes some time → use async functions and await

 

Documentation

🔧   💥   constructor

Creates the Object to use the library.

var pump = new mtecConnectModbus(inverterNumber);

parameters:

• string (length: 2), inverter number (parameter F802), optional (default: "01")

result:

• mtecConnectModbus, conatins everything used to communicate via modbus

 

🔧   🔌   connect

Connects to the serial converter.

📝   .connect() has to be triggered by user gesture (e.g. onclick)

var connected = await pump.connect(); // has to be triggered by user gesture (e.g. onclick)

result:

• bool, connection to serial interface sucessful?

 

⚙️   🔄   keep alive

📝   While the pump is running, a valid command has to be sent at least every second

If activated, the keep alive feature sends a command some time (interval) after the last command.

This feature can be tweaked in the settings:

• bool pump.settings.keepAlive.active, if keep alive feature is enabled, default: true
• int pump.settings.keepAlive.interval, interval after which the command is sent (in ms), default: 250
• string (or function with return string) pump.settings.keepAlive.command (length: 10), action number (2) + parameter number (4) + value (4), default: "03FD000001"
• function pump.settings.keepAlive.callback, gets called with return value as parameter, optional

 

🔧   ▶️   start & stop

Starts or stops the pump (target frequency has to be set)

// target frequency has to be set
await pump.start();         // starts the pump
await pump.startReverse();  // starts the pump in reverse
await pump.stop();          // stops the pump

 

✏️   ⏲️   set frequency

Sets the target frequency

await (pump.frequency = frequency);

parameters:

• float, positive (resolution: 0.01), target frequency in Hz

 

🔍   ⏲️   get frequency

Gets the actual frequency

var frequency = await pump.frequency;

result:

• float, positive (resolution: 0.01), actual frequency in Hz

 

✏️   ⏩   set speed

Starts (or stops) the pump in the desired direction

⚠️   Do not switch between set frequency and set speed

await (pump.speed = speed);

parameters:

• float, negative to reverse (resolution: 0.01), target frequency

 

🔍   🚦   get ready

Gets the readiness of the machine (on)

var ready = await pump.ready;

result:

• bool, machine is ready for operation

 

🔍   ⚡   get voltage

Gets the actual output voltage

var voltage = await pump.voltage;

result:

• float, positive (resolution: 0.01), actual voltage in % of voltage rating

 

🔍   💡   get current

Gets the actual output current

var current = await pump.current;

result:

• float, positive (resolution: 0.01), actual voltage in % of current rating

 

🔍   💪   get torque

Gets the actual torque

var torque = await pump.torque;

result:

• float, positive (resolution: 0.01), actual voltage in % of torque rating

 

🔧   #️⃣   send custom command

Sends custom command to inverter

var answer = await pump.sendCommand(parameter, value);

parameters:

• string (length: 6), action number (2) + parameter number (4), example: "03FD00"
• int, value

result:

• int, answer value (equals input value if write command)