RT target slows down after updating with a shared variable

I am using a shared variable that is defined in the RT target (cFP-2110) to transfer data from the host PC. The shared variable is a cluster of scaling parameters that needs to be stored in the RT target. The host PC is only connected temporarily for system setup and calibration.
There is only one instance of the shared variable in both the host PC vi and the target vi. The shared variable in the host is located in an event case that is activated when there is a value change. Everything works great until I make a value change in the shared variable. The target vi promptly slows from 30mSec to about 500 mSec and stays that way. The only way I can get the RT target to run full speed again is to recycle power or reset it.
What am I doing wrong?
Temporarily slowing down the RT target when the shared variable is updated is not a problem for this application. The problem is that I have to restart the target to get it running at full speed again.
I’m using Win-XP, LV 8.5.1 and FieldPoint 6.0.1
Thanks,
Dave J.

Hi Mark,
The host is sending the shared variable via an event case. When the event is activated, the data is sent to the target and it functions as expected, except that it slows down to a crawl. I have to restart the target to get it working up to speed again. The are no error codes.
The shared variable is a cluster of several items and it is attached.
In the mean time to promote the project, I split up the cluster into smaller clusters to use several shared variables and now I do not have a slow down problem. In other words, it works great. As an experiment I have sent the several small clusters at one time and I get the slow-down problem again.
I've come to the conclusion that large single cluster (which is attached) is too much to send at one time.
Please advise if there is something else to learn or understand.
Thanks,
Dave J.
Attachments:
Host Data In.ctl ‏33 KB

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RT target slows down after updating with a shared variable

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