Fieldpoint engine not updating after first value

[tfarley]

I'm using an FP-1000 and an FP-TC-120 with two thermocouples attached. I've successfully set everything up with Fieldpoint Explorer and the data updates perfectly. The problem is when I try and read the tag values using a VI in Bridgeview. I start the VI and it starts the Fieldpoint Engine and reads the first value from it. This is the only value it will report to the VI and I can't figure out what the problem is. The only way to get a new value is to restart the engine, and once again it only reads one value and then doesn't update anymore. The VI continues running and getting data but it's always the same as the first time. I tried searching for a problem similar to mine but I wasn't sure what exactly to search for and I couldn't find much help.

Thanks.

[Aaron_G]

There are several items in the tag configuration that you should check as they may cause extremely slow updates. First (and most likely), check the Update Deadband. If I recall correctly, it defaults to 1%. With an FP-TC-120 set to -270 to 1770 C, that is 1% of 2040 C or 20.4 C. This means that the engine will automatically filter out changes that are less than 20.4 C from the initial value. Next, check the tag update rate. You should set it for an interval of 1.13 seconds (All Channel Update Rate of the FP-TC-120). Finally, check the group update rate.

Edit: A more appropriate deadband would be 0.05% or 1.02 C with the -270 to 1770 C range.

Regards,
Aaron

Message Edited by Aaron G on 03-06-2005 08:38 AM

[tfarley]

That fixed it. It's working perfect now. I appreciate your help!


Travis