ModbusRtuMasterSendModbusRequestAsync 方法
            异步发送Modbus请求
            
命名空间: TouchSocket.Modbus程序集: TouchSocket.Modbus (在 TouchSocket.Modbus.dll 中) 版本:4.0.0-beta.143+5fcca7a4e70968794985dc3793adc50531308be6
public Task<IModbusResponse> SendModbusRequestAsync(
	ModbusRequest request,
	CancellationToken cancellationToken
)
Public Function SendModbusRequestAsync ( 
	request As ModbusRequest,
	cancellationToken As CancellationToken
) As Task(Of IModbusResponse)
abstract SendModbusRequestAsync : 
        request : ModbusRequest * 
        cancellationToken : CancellationToken -> Task<IModbusResponse> 
override SendModbusRequestAsync : 
        request : ModbusRequest * 
        cancellationToken : CancellationToken -> Task<IModbusResponse> 
- request  ModbusRequest
 - 要发送的Modbus请求对象
 - cancellationToken  CancellationToken
 - 用于取消操作的CancellationToken
 
TaskIModbusResponse返回一个任务,该任务完成后将包含相应的Modbus响应
IModbusMasterSendModbusRequestAsync(ModbusRequest, CancellationToken)