Question

我想通过NI PCI 6713上的数字触发器来触发模拟输出

http://www.ni.com/pdf/manuals/371011c.pdf

根据数据手册，我可以使用PFI <0..9>，并且在使用ao / StartTrigger的NI MAX中这些引脚确实显示为绿色

我的代码如下：

    task = nidaqmx.Task()
    task.ao_channels.add_ao_voltage_chan("Dev12/ao0")
    task.triggers.start_trigger.cfg_dig_edge_start_trig("Dev12/PFI0")
    task.timing.cfg_samp_clk_timing(rate=1)
    task.start()
    task.write([1,2,3,4,5,6,7,8,9,10,0])

我收到以下错误：

DaqError: Source terminal to be routed could not be found on the device.

Make sure the terminal name is valid for the specified device. Refer to Measurement & Automation Explorer for valid terminal names.
Property: DAQmx_DigEdge_StartTrig_Src
Property: DAQmx_DigEdge_StartTrig_Edge
Source Device: Dev12
Source Terminal: Dev12/PFI0

Channel Name: Dev12/ao0

Task Name: _unnamedTask<1C>

Status Code: -89120

我使用Python 3.7

Answer 1

为channels指定名称时，格式为device_name/channel_name。
对于physical terminals，格式为/device_name/terminal。

请注意终端的斜杠：

task.ao_channels.add_ao_voltage_chan("Dev12/ao0")
task.triggers.start_trigger.cfg_dig_edge_start_trig("/Dev12/PFI0")
                                                     ^
                                                    Here

用于模拟输出的数字触发器

1 个答案: