VISA Write Continously

[mehala]

Hello. I am needing some help on VISA Write function. I saw a few post close to my needs but I am quite confuse. I am working on a project to control 2 servo motor (yaw and pitch).

I am using VISA write to send data to serial port. But, I can only send once (e.g: 8813 8813- hex). If I want to send the second one, (e.g: 7C15 7C15), I have to clear the data manually on my front panel. Only this makes my servo to move for any data that I send. 

Somehow, when I send my second data (e.g: 7C15 7C15), it indicates "return count-8" and "status write- operation completed sucessfully" but my servo does not move.

I am unsure how to troubleshoot this issue. Your kind assistance will really help me alot. Thank you.  

[Dennis_Knutson]

It really does no good to keep hammering the device with the same data. Use an event structure to only send when the string changes value.

[mehala]

Thank you for the guidance.

Is there any example code related that I can go through? 

[Dennis_Knutson]

Help> Find Examples for the event structure.