The VISA read function is not reading the specified bytes from the buffer

[chrisqweert]

I created a program that continuously acquire data from an inverter. But,the "VISA read" function is not rreading all the bytes from the buffer which is a big problem because the way my program work is it will extract the specific bytes at the buffer and convert these values to voltage and current values.

I specified the number of bytes that I want to read from the buffer like for instance I want to read 21 bytes. But, even if there are 21 bytes at the buffer, the VISA read function only read 9 bytes. Im not using any termination character so this is weird. Im using LabVIEW 2011.

Attached is a picture of my program and also the results.

[crossrulz · Accepted solution]

You still have the termination character enabled.  You need to wire up a FALSE to the Termination Character Enable input on the Configure Serial Port.

[Dennis_Knutson · Accepted solution]

Your code has done basic problems on that you have specified a termination character and then you use bytes at serial port. DON'T use both. You have to understand that with a termination character, the VISA Read will automatically terminate when the character is detected and with hex being read, the termination character you've specified can easily be in the byte stream.