Hello,
I'm trying to connect LabVIEW to Danfoss VLT Automation Drive FC 302 via Modbus RTU and RS 485. When i do this, i get Error 56 (Timeout). I tried several Codes.
Both Codes can be found in the following YouTube Videos:
LabView "Modbus RTU" Danfoss FC302 Tutorial (youtube.com)
Simple Modbus Code Part 2 (youtube.com)
In both Codes, i got the same Error Message.
The first Link has exactly the functionality i need!
I can confirm that Unit ID, Baudrate, Flow Control, parity and stop bit are correct, because i was able to get a connection threw the same interface with the MCT 10 Software (a Software from Danfoss) to the VLT.
I can see the Interface in NI Max. Nevertheless i reinstalled NI VISA and NI MAX (i can still see the interface). I still got the Error Message 56.
Also i set the time for a Timeout to 120s. This did not change anything. I still get Error 56.
Do you have any idea how to fix the problem?
Thank you for your input!
