Poor response of LV 8.0.1 & DSC with RSLinx

Hi,
I'm having some flakey problems with response times using LV DSC 8.0.1 reading shared variables connected to RSLinx 2.50. The aim here is to see if LV DSC is sufficiently robust enough to use it as an HMI on a large project. (I've previously used RSView32 without any mentionable problems on a 5000+ tag system)
The arrangements are:
ControlLogix PLC running sample code being scanned via 100Mb Ethernet connection from RSLinx Gateway 2.50.00.20 (CPR7)
LabVIEW 8.0.1 with DSC module 8.0.1
Shared variables linked to RSLinx Gateway via Topic
Sample front panel with BOOL buttons, Double and BOOL indicators etc.
A second computer running Server Explorer 2.4.1 to look at OPC tags (SV) from the SV engine and RSLinx
OPC scan rates set to 100ms placing on scan about 30 tags (to use PLC parlance!)
After a few false starts largely to do with data types I have the systems running but am experiencing somewhat flakey performance comparing button presses to indicator illumination.
There seems to be a delay in relaying all types of data to the front panel of somewhere between 4-10seconds or more. This has been confirmed by using RSLogix 5000 to look at the ladder code and RSLinx Data Monitor to monitor the PLC tags. BOOL button writes are too quick to measure so I know it's not a problem of sending the information. This response seems to be corrected by means of a reboot but not all the time!
Are there any Shared Variable issues with LabVIEW 8.0.1 and DSC 8.0.1 that are cured by a patch or by an upgrade to 8.2?
Can I monitor any performance parameters or memory use to helpl diagnose the problem?
Thanks...Andy
Lead Engineer, Controls and Electrical
Irvine CA

Writing this purely for the record!
We found that the slowdown problem was random and was either non-existent or at maximum 14 seconds. The problem was "cured" by moving the Shared Variable engine to another computer, leaving RSLinx running on the original computer. There seemd to be no delay in 1-day of testing but I may be proved wrong!
Our architecture (which we'd intended to do) will therefore be RSLinx 2.50 on a Control server, LabVIEW DSC and the Shared Variable Engine on another. Clients will then connect to the SVE to pull off HMI displays and to view data.
End of Topic
Lead Engineer, Controls and Electrical
Irvine CA

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