Hello everyone! Describtion of the problem:i currently try to control a highvoltage generator with Visa Serial. The PC running Labview is connected to the device over a usb to RS232 adapter. I send a ascii string to control the devices Voltage setting. I can read and write parameters into the device and always get a 24 charakter while reading the process parameters. My problem starts when the electrical field has a discharge. That means the output voltage drops and the current rises, resulting in a blank where the 24 charakter answer should be. After that i stop the problem resulting in the described error code. A restart of the problem also show a blank where the 24 charakters schould be. Stoping the problem after that shows me the error Error -1073807360 occurred at Property Node (arg 1) in VISA Configure Serial Port (Instr).vi->DCHSP write and read.vi(DCHSP=Direct current High voltage Generator)Unplugging and replugging the USB adapter allows me to reset the program. Question:How can i implement a reconnecting of the usb port into my labview program? Can a drop in the signal voltage cause this problem? Inserting an optocoppler has delayed the occurance of the problem.

@sefranz wrote: Hello everyone! Describtion of the problem:i currently try to control a highvoltage generator with Visa Serial. Hmmm... How high is high? The high voltage could be inducing noise or a pulse high enough in your serial cable to disrupt the communications, cause errors, and maybe even crash your computer entirely. We have a surge generator in our lab or applying high voltage surges and spikes onto power lines. This surge generator can run remotely using serial but the cables are heavily shielded. Believe me if you try to use any other serial cable besides the one that came with it, the Communications will be disrupted everytime it generates a voltage pulse. I just glanced at your code, I also recommend you watch this video: VIWeek 2020/Proper way to communicate over serial

LabVIEW

error -1073807360 occured on Visa Write after Discharge occured on controlled High Voltage device

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Thanks for the answer, i was hoping i did not need to shield my whole plant on a higher level. I was hoping that there was an easy solution, since all LabView related programs where affected (VIs, FlowDDE). I will mark your first reply as solution, since the video linked to it had very good advices in it.