Sharp7Reactive

This is an additional library for the usage if Sharp7. It combines the S7 communication library with the power of System.Reactive.

Main features

• Completly free and ready for usage (the library is already widely used in many enterprise environments)
• Connection status observation and auto-reconnect
• Type safe and with generics
• Threadsafe (Sharp7 is basically not threadsafe)

Quick start

The example below shows you how to create and use the Sharp7Rx PLC.

using (var disposables = new CompositeDisposable())
{
    // create a new PLC
    var plc = new Sharp7Plc("10.30.3.10", 0, 2);
    disposables.Add(plc);
    
    // initialize the plc
    await plc.InitializeAsync();
    
    //wait for the plc to get connected
    await plc.ConnectionState
             .FirstAsync(c => c == Sharp7.Rx.Enums.ConnectionState.Connected)
             .ToTask();
    
    await plc.SetValue<bool>("DB2.DBX0.4", true); // set a bit
    var bit = await plc.GetValue<int>("DB2.int4"); // get a bit
    
    // create a nofication for data change in the plc
    var notification = plc.CreateNotification<bool>("DB1.DBX0.2", TransmissionMode.OnChange, TimeSpan.FromMilliseconds(100))
                          .Where(b => b) //select rising edge
                          .Do(_ => doStuff())
                          .Subscribe();
    disposables.Add(notification);
    
    //wait for enter before ending the program
    Console.ReadLine();
    
}

the best way to test your PLC application is running your SoftPLC locally.

S7 Addressing rules

Sharp7Reactive uses a syntax for identifying addresses similar to official siemens syntax. Every address has the form (case unsensible) DB<number>.<TYPE><Start>.<Length/Position>.
i.e.: DB42.DBX0.7 => (means) Datablock 42, bit (DBX), Start: 0, Position: 7
or
DB42.DBB4.25 => (means) Datablock 42, bytes (DBB), Start: 4, Length: 25.

Following types are supported:

• DBX => Bit (bool)
• DBB => byte or byte[]
• INT
• DINT
• DUL => LINT
• D => REAL

Would you like to contribute?

Yes, please!

Try the library and feel free to open an issue or ask for support.

Don't forget to star this project!