The point discovery process historically has displayed the data cached in the drivers database which is built up during the initial discovery of the device.
In newer versions of this driver, in line with the device discovery process, a wizard is presented to allow the discovery of previously learnt points, or to allow a scan to be run directly against the device.
By default when discovering a device the system will only read the contents of the first data message, should you require data from the subsequent message, then a manual scan will be required. Data will then be located from the additional messages but this can only be achieved by scanning the device directly.
All known data already stored in the database is presented, as potential candidate points for the device. If nothing is shown, a live scan will be required, as the database is likely to have been cleared.
The 'Maximum reads limit' sets a limit to the number of sequential messages to read through while they are available from the device. Most devices will only have between 1 and 4. A few devices could have more. Increasing this will increase the time and station memory required. For all known use cases 10 should be sufficient. If you need less than this it is recommended to reduce this value appropriately to increase the scan speed.
Copyright © 2000-2014 Tridium Inc. All rights reserved.