使用GPIB函数时，GPIB控制器的默认主地址为0，无次地址。它被指定为系统控制器。函数的默认超时值为10秒。如需重新设置主地址或超时值，可使用GPIB控制器附带的配置函数。

You also can use the GPIB Initialization and SetTimeOut functions to set the primary address and to change the default timeout value at run time, but these functions affect the interface only when you use it with LabVIEW. 更多信息见硬件接口附带的文档。