I am glad you were able to get a response from the servo. This means the hardware is functioning and we can focus on the LabVIEW code. I don’t know much about LabVIEW, but I can point you to another resource on the forum where a customer was able to control one of our Maestro servo controllers with LabVIEW:
I would recommend looking at how he assembles the serial bytes because the Maestro protocol is pretty similar to the Pololu Serial 8-Servo Controller and his code looks different from yours.
If that does not work, maybe you could try sending just one hardcoded with LabVIEW. By specifying each byte of the command instead of trying to compute them from a servo position, you can be more sure that you are getting the command right and you might be able to make something work. That would be a good first step towards building the general code that you want.
–David