Need to run a "fieldpoint clear" before fieldpoint modules respond swiftly

[sean T M]

Wayne, thanks for your response.  My system communicates with three cFP2000s via ethernet.  I came in late on this project and did not design the whole setup.  The write performance to the fieldpoint modules seems to vary a lot.  A day after your last post it was working fine, now today my Labview app. basically grinds to a halt wheneven I try to set relay values in the fieldpoint modules.  The actual writes to the fieldpoint modules are done with a VI called relaywrite1.vi.  See attached screenshot.  Accessing the relays on the fieldpoint module has always been problematic.

Thanks if you can make any suggestions.

[Wayne.C]

Sean,

I started with LV7.1 and have always used the FP Read.vi and FP Write.vi.  Not a lot of experience with tags.  It looks like this code opens a connection to the cFP, creates a tag, updates that tag and then closes the connection every time you write an output.  My theory is that the overhead of opening the connection and creating the tag is slowing down your program.

I would think that there would be a way to move the overhead outside the main loop of your program.

Message Edited by Wayne.C on 07-30-2009 04:49 PM