python - 模拟输出的数字触发器

Question

我想从 NI PCI 6713 上的数字触发器触发模拟输出

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

根据数据表，我可以使用 PFI <0..9> 并且这些引脚在 NI MAX 中确实显示为绿色，带有 ao/StartTrigger

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

• 指定频道名称时，格式为device_name/channel_name.
• 对于物理终端，格式为/device_name/terminal.

注意终端的前导斜杠：

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