Hi Pierre,
you should at first clean up your VI:
- After doing so you should check the display type of all string constants and indicators. As I switched on "display mode" for those string constants I noticed they are not the same…
- Then you have configured SerialPortInit to use LF as TermChar. Does your device support such TermChar? If yes: use it by requesting slightly more bytes for VISARead then the device will likely send in it's answer to your request.
- Please check the device's manual for any required TermChars in the message as you have to append them on your own! In case the device is waiting for some special TermChar you will may not receive any answers…