The registration for the COV report ("Change Of Value" - event-oriented data transfer) can occur only for the property "Present_Value". For various older BACnet devices the number of COV registrations is limited. That means that it might happen that the number of unsolicited addresses is bigger than the number of the available COV registrations in a device.
A limitation of the COV entries occurs only when using an older device model. In such a case the following approach is taken:
Caution When designing the system, it is to consider that the number of COVs does not exceed 200 COVs per second due to the danger of getting a buffer overflow. |
V 3.11 SP1
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