VISA speed

[Ams]

Hello,

I am trying to control a GPIB using an VISA VI however there seems to be a time delay (tenth of a second) between the control value from my program and the corresponding change in the value on the

controller. Is this delay intrinsic to the communication system (hardware or software) , if no how can I decrease it. I have attached the code for reference. I want the values to scan through in a milli-second instead of a second.

The  controller is a laser diode controller  (model LDC-3714B)

Thanks

Ams 

[tinnitus]

hello Ams,

i don't think visa is the cause, stop working with this programming "concept" or you 'll spend exponential time en nrj for nothing...

Have a look on state machine file -> vi (new...) and look for state machines template and also events structure

https://www.ni.com/en/support/documentation/supplemental/16/simple-state-machine-template-documentat...

https://www.ni.com/en/support/documentation/supplemental/06/event-driven-programming-in-labview.html

have fun

Best regards

Tinnitus

 NB : i think NI sould hide stack sequence in the deepest possible palette it will avoid beginners starting with the worst existing structure...

Message Edité par tinnitus le 04-21-2009 06:46 PM

[Jason_D]

Ams,

If you are looking for a performance increase the first place I would start would be to get the Write to File operations out of you main loop and implement something like a producer consumer design pattern.  A helpful document here.