hello,  
i am working with solar inverter and i want to acquire voltage and ampere with USB RS485 as modbus. 
i am using LABVIEW 2012 and visa serial in LABVIEW. 
i already make it but the chart doesnt show anything. 
could you please help or make a little correction in my block diagram. 
here is my block diagram *first to acquire voltage 
  
thankyou for your kind attention and help  
Untitled 1.vi