ASRL_WIRE_MODE

I don't know if I should ask here or better in the Instrument Control forum, we will try...

At the start of the program using VISA, I ask all available ports (for access and properties). In order to distinguish between RS232 and RS485, I use the VI_ATTR_ASRL_WIRE_MODE attribute.

Surprisingly, the call returns VI_ASRL_WIRE_485_4 which I guess means RS485. However, the port is RS232, this is confirmed by also reading the port description that says: NI PCI-8430/8 (RS232)... (according to the NOT-MAX)

The software is developed with CVI 8.5 and now using VISA 5.4. As I recently upgraded from VISA 5.3 I suspect some incompatibility, could it be...?

Since other software also running on the same computer, the runtime is CVI2013.

If it's a compatibility issue (VISA readme suggests, therefore, that is only compatible with CVI9.0 and later versions), how should I design my software to know - it's sort of stupid if the code is broken in updating a driver.

Thank you!

Hello Wolfgang,.

I did some research and discovered that it is a known issue and it should be fixed in the new VISA driver version 14.0 (he must be released with the new LabView in August).

However I don't know that if this version works with your Version of CVI, there is no official information about this yet.

Good day

Janina Huether

Tags: NI Software

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