设备函数

设备函数用于发送配置信息至特定的仪器或设备。

loc－转到本地

off－使控制器离线

pct－传递控制权

ppc－配置并行轮询

loc－转到本地

loc 暂时将设备从远程程序模式转到本地模式。

地址 设备的GPIB地址。 This argument indicates both primary and secondary addresses if you use the form primary+secondary, where primary and secondary are the decimal values of the primary and secondary addresses. For example, if primary is 2 and secondary is 3, address is 2+3.

loc 发送“转到本地”(GTL)消息至GPIB设备。

off－使控制器离线

off 使指定GPIB地址上的设备离线。只在与使用NI-488 GPIB库的另一应用程序共享设备时使用。

地址 设备的GPIB地址。 This argument indicates both primary and secondary addresses if you use the form primary+secondary, where primary and secondary are the decimal values of the primary and secondary addresses. For example, if primary is 2 and secondary is 3, address is 2+3.

pct－传递控制权

pct 将“管理控制器”(CIC)权限传递给指定地址的设备。GPIB控制器自动转入空闲状态。该函数假定接受pct传递的控制权的设备具有控制器功能。

地址 设备的GPIB地址。 This argument indicates both primary and secondary addresses if you use the form primary+secondary, where primary and secondary are the decimal values of the primary and secondary addresses. For example, if primary is 2 and secondary is 3, address is 2+3.

pct 发送下列命令序列：

1. 设备的通话地址
2. 设备的次地址（如有）
3. 取得控制权(TCT)

ppc－配置并行轮询

ppc 启用仪器响应并行轮询。

字节 是0或合法的启用并行轮询(PPE)命令。 If byte is 0, the parallel poll disable (PPD) byte 0x70 is sent to disable the device from responding to a parallel poll. 16条启用并行轮询(PPE)消息中的每一条都可选择GPIB数据线(DIO1-DIO8)及状态（1或0），设备在并行轮询时必需使用该状态响应“标识”(IDY)消息。设备比较ist状态并驱动指定的DIO线为TRUE或FALSE。

地址 设备的GPIB地址。 This argument indicates both primary and secondary addresses if you use the form primary+secondary, where primary and secondary are the decimal values of the primary and secondary addresses. For example, if primary is 2 and secondary is 3, address is 2+3.