program slow down from Labview 6.1 to 7.1

[Yfayne]

I was using simplePID to control a sequence of temperture control. The program is in two independent while loops. one is for DAQ and output control, one is for generating the setpoint sequence for the PID controller. The DAQ is updating temperture every second using AI acquire waveform. I use local variable for communication between the two loops. The code run well in Labview 6.1. When I try to run the same code in 7.1, it took more than 11 sec for one loop, the temperature updating every 11 sec or so. I am just wondering what's wrong with labview 7.1? The program structure is simple enough. Anyone met similar problem before?

Thanks!

[Mikael]

Hey, I don't have a solution. I just wanted to let you know that you are not alone. I use while loops and run an aquisition program wich communicates with the instrument over RS-232 in ASCII. In LV 6.1 it runs just fine, but in 7.1 it seems to stop the aquisition every 3 seconds and freeze the last value for a second. In 6.1 it would update twice every seconds. This is very strange, even on a more powerful computer it still does the same.

/Mike

[waldemar.hersacher]

This could be an issue discribed in the Knowledge Base [link removed; article no longer available]. You should update to LV 7.1.1 which is a free update.