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Keep Performance Up with Auto Demotion 
When Polling Many Devices

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The Device Auto-Demotion parameters allow a driver to temporarily place a device off-scan in the event that a device is not responding. By placing a non-responsive device off-line, the driver can continue to optimize its communications with other devices on the same channel by stopping communications with the non-responsive device for a specific time period.

After the specific time period has been reached, the driver will re-attempt to communicate with the non-responsive device. If the device is responsive, the device will be placed on-scan, otherwise it will restart its off-scan time period. Devices on different channels will have a limited effect on communications due to the multi-threaded nature of the TOP Server.  See Multiple connections for more information on this feature.

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You can also change these settings on the run by writing to the System Tag for each of the settings above.

Note: We suggest starting your project with this disabled until after you have verified communications to your device are working.  If you aren’t connected to a device you can also disable the device while testing to avoid getting communications errors in the event log that can effect performance. 

 

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