06-17-2007 11:02 AM
06-18-2007 03:35 AM
The clock on the FP-2000 has normaly an accuracy of about +/- 1min/Month. However the process on the controller that is running the clock is a low priority process. When you controller has higher priority tasks to perform, which take a lot of processing power, it can happen that the clock will get behind more then usual. When a host computer is connected to the system the controller will check with the host computer (its time server) if the clock is running correctly and adjust it when needed. At Stand-Alone Base this timeserver is not available.
There is a VI under: Real-Time>>RT Utilities which is called RT Set Date and Time which can be used to set the date and time on the controller. The problem is however that you would need a reference to set your clock to. If the amount of time the clock runs behind every day is pretty consistend maybe you can use this VI to adjust the clock with a certain amount of minutes every now and then. Ofcourse you still will not have a very accurate clock setting but still more accurate as it was. The only other option you would have is a permanent time-server connected to the FP controller.
Hope this helps,
RikP - National Instruments Applications Engineering
06-18-2007 10:28 AM
06-18-2007 01:52 PM
I already use the RT Set Date & Time utility every time the host PC contacts the FP-2000. But there may be a week or more between those contacts.
Thanks for the advise anyway.