Part
2. Functional Specifications
84
Design Guide
DCM014A51
8. Report Function
8.1 COV Notification
The subscribed COV notification (DS-COV-B) is supported.
1. Subscribed COV Notification
Requests for COV subscription are received by the SubscribeCOV service.
a. Setting Confirmed/Unconfirmed COV notification with/without confirmation.
Supported as defined in the BACnet® specifications.
b. Setting validity period of notifications.
Supported as defined in the
BACnet
specifications whether or not the validity period has
expired is judged when executing the COV notification at a status change. If the
calculated difference between the current time and subscription time is larger than the
defined validity period, the notification is cancelled. Therefore, if the clock was changed,
the actual validity period may differ from the defined validity period.
c. Retention of subscription information at power off.
Not supported.
The subscription information is not written to memory; therefore, it disappears at power
off.
The retention of subscription information during power off is not required by the
BACnet
specifications.
d. Notification recipient information.
It is included in the Active_COV_Subscriptions property of the device object mapped to
the indoor unit and system control device object.
e. Number of notification recipients.
The number of notification recipient registrations per object is limited to 5 clients.
An attempt to register beyond 5 clients returns Error Class = SERVICES,
Error Code = COV_SUBSCRIPTION_FAILED.
