不能声称PosPrinter

Question

我有一台TM-T20 Epson，我使用此代码试图打印：＆＃34; Hello Printer＆＃34;消息，我一直跟踪PosPrinter的一些特征：

public void ImprintHelloPrinter()
        {
            //The Explorer
            PosExplorer explorer = new PosExplorer();

            ////Get the device by its type LOGICAL NAME
            DeviceInfo device = explorer.GetDevice(DeviceType.PosPrinter, "T20PRINTER");

            //Create an instance
            PosPrinter oposPrinter = (PosPrinter)explorer.CreateInstance(device);

            //Opening 
            MessageBox.Show(@"Statue : " + oposPrinter.State.ToString());
            oposPrinter.Open();
            MessageBox.Show(@"Statue : " + oposPrinter.State.ToString());

            //Checking if its really the printer
            MessageBox.Show(@"Description : " + oposPrinter.DeviceDescription);


            MessageBox.Show(@"Check Claimed : " + oposPrinter.Claimed.ToString());
            oposPrinter.Claim(10000); //Here is My Exception 

            //Enabeling device
            oposPrinter.DeviceEnabled = true;

            //normal print
            oposPrinter.PrintNormal(PrinterStation.Receipt, "Hello Printer");
        }

一切顺利，我检查它是正确的打印机，它打开并且没有声明，但是当我尝试声明它时，我有以下例外：

Method ClaimDevice threw an exception.  Attempt was made to perform an illegal 

or unsupported operation with the device, or an invalid parameter value was used.

即使在示例应用程序文件夹（ C：\ Program>中的 Microsoft Point of Service SDK 提供的示例应用程序中也是如此文件\ Microsoft服务点\ SDK \ Samples \示例应用程序），我可以找到我的打印机，打开它，但当我声明它时，我有这样的错误消息：

POSControlException ErrorCode(Illegal) ExtendedErrorCode(10002) occurred:
Method ClaimDevice threw an exception.  Attempt was made to perform an illegal
 or unsupported operation with the device, or an invalid parameter value was 
used.

示例应用程序的打印屏幕：

Answer 1

该错误是因为您配置的端口错误。
就我而言，我使用的是连接到硬件NPort 5110的FP-81 II型，其中我将端口配置为9100。

希望对您有所帮助。