Slow Shared Variable Tag Update Rate on VI Front Panel

[PierreN]

I have a DSC application connected to 4 Allen-Bradley PLC's - 3 SLC500 and 1 Micrologix - through NI OPC Server.  Total tags from all combined are 1100.  Update rates of data into the OPC and to the shared variables are good, but update onto VI frontpages is extremely slow - up to 60 sec on a timer to monitor heartbeat.  I might have too many tags on one page, but surely that is why the variable engine is supposed to take care of that process.  Any suggestions on what can be done to improve this?

Pierre

[SnowForest]

Hi,

Sometimes if there is a many controls in front panel  it is more effcient update all controls\indicators in same time. Normally they are updated one by one. First disable front panel updating and when values are updated then enable front panel updating. This can be done by using property node. Use reference "This VI" and property nodes: Panel->DeferPanUpdts.

Jim

[PierreN]

Hi Jim,

Thanks for the reply,  I will try that proposal.

Pierre