The device’s poll rate governs how frequently a third-party BACnet device communicates with the supervisory controller. A too fast poll rate may adversely affect the performance of the supervisory controller. By increasing the number of seconds the network engine waits before flagging a field device as offline, you can minimize the number of false offline reports. Three different sensitivity options, each with a different set of values, are available: high, medium, and low. The default setting for all network engines upgraded to Release 10.0 is medium. For further information on poll rate, refer to the section Adjusting NAE network sensitivity in the NAE Commissioning Guide (LIT-1201519).
Note: The supervisory controller supports client Change of Value (COV) subscription, which reduces the need for polling. The remote BACnet device must be capable of executing COV subscription to take advantage of this service.