6451 Digital Logic Level

[niNickCardiff]

Hello,

I'm trying to set the digital logic level on my 6451.

I've tried setting the do logic family for each channel in the task but I get an error:

nidaqmx.errors.DaqError: Specified property is not supported by the device. Use the recommended Physical Channel property outside of the task instead.

Unsupported Property: DAQmx_DO_LogicFamily
Recommended Property: DAQmx_PhysicalChan_Dig_PortLogicFamily

I can't work out how to following this hint

I'm using the DAQmx driver in Python

Many Thanks

Nick

[santo_13]

Based on the specification, you can set the logic level for the whole port but not by channel.

Looks like the Python wrapper is NOT fully featured. Only related property I found is this,

Based on the docs, I see there is a constant but not support all values of 6451

Whereas on the LabVIEW side, I see a property to set the logic level,

[niNickCardiff]

Thanks for your answer.

I tried the power up state function but also got a "not supported on this device" error.

Immensely frustrating that the python API is not properly supported. 

There is no chance we are using LabVIEW. 

Is there someway I can call the DLL direct from python? 

[santo_13]

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@niNickCardiff wrote:

Thanks for your answer.

I tried the power up state function but also got a "not supported on this device" error.

Immensely frustrating that the python API is not properly supported. 

There is no chance we are using LabVIEW. 

Is there someway I can call the DLL direct from python? 

---

Yes, you can call the C-dll directly in Python. 

https://www.ni.com/en/support/documentation/supplemental/21/using-ni-daqmx-in-text-based-programming...

https://docs.python.org/3/library/ctypes.html

Please raise issues for these gaps at https://github.com/ni/nidaqmx-python/issues

[niNickCardiff]

I'm not sure why I considered this as I really need both Windows and Linux support and I don't really want all that faff.

Unfortunately, this is gonna be a bit of a deal breaker for use of NI hardware I think. 

Wild that they don't have really well featured python drivers.

Thanks for your help!