/// <summary>
/// Reading request to Modbus target device
/// </summary>
public override Task <ModbusReadResponse> ReadModbus(ModbusReadRequest request, ServerCallContext context)
{
// Get required device
var address = Convert.ToString(request.Ip);
var port = Convert.ToUInt16(request.Port);
var device = new Tuple <string, ushort>(address, port);
DeviceContextsPool = ModbusContextMultiton.GetInstance(device);
var registerType = request.RegisterType;
var startAddress = Convert.ToUInt16(request.StartAddress);
var readCnt = Convert.ToUInt16(request.ReadCnt);
// Request Modbus slave
// TODO: Fix type conversions in library
// TODO: Think more about logic to call required function
byte[] seq = null;
switch (registerType)
{
case ModbusRegisters.Coil:
var resultCoil = DeviceContextsPool.ModbusContext.ReadCoils(startAddress, readCnt);
seq = Array.ConvertAll(resultCoil, b => b ? (byte)1 : (byte)0);
break;
case ModbusRegisters.DiscreteInput:
var resultInput = DeviceContextsPool.ModbusContext.ReadDiscreteInputs(startAddress, readCnt);
seq = Array.ConvertAll(resultInput, b => b ? (byte)1 : (byte)0);
break;
case ModbusRegisters.Holding:
// var result_holding = device_context.ReadHolding(startAddress, readCnt);
// seq = Array.ConvertAll(result_holding, b => b ? (byte) 1 : (byte) 0);
break;
case ModbusRegisters.Input:
// var result_input_registers = device_context.ReadInputRegisters(startAddress, readCnt);
// seq = Array.ConvertAll(result_input_registers, b => b ? (byte) 1 : (byte) 0);
break;
}
Console.WriteLine(ByteString.CopyFrom(seq));
return(Task.FromResult(new ModbusReadResponse
{
Seq = ByteString.CopyFrom(seq)
}));
}
/// <summary>
/// Client new Modbus connection initialize
/// </summary>
public override Task <ModbusConnectionResponse> ConnectDevice(ModbusConnectionRequest request,
ServerCallContext context)
{
var address = request.Ip;
var port = (ushort)request.Port;
var device = new Tuple <string, ushort>(address, port);
// Register device context
DeviceContextsPool = ModbusContextMultiton.GetInstance(device);
// Initialize connection
DeviceContextsPool.ModbusContext.Connect();
// Send connection status
return(Task.FromResult(new ModbusConnectionResponse {
Connected = true
}));
}
