pCOWeb +030220966 – rel. 1.1 – 12.12.2017 39
7.3.1 COV Subscriptions
The DS-COV-B and/or DS-COVP-B BIBB support a maximum 250 simultaneous subscriptions. The following properties are eligible for COV reporting using
the SubscribeCOVProperty Service:
• Present_Value
• Status_Flags
• Reliability
• Event_State
• Out_of_Service
7.3.2 Commandability
BACnet commandability is supported for the Analog Values, Binary Values and Multi-state Values on an individual object basis. In addition to being optionally
selected as commandable, each of these individual objects may be programmed as read-only or writable but not commandable. This condition is controlled by
writing to the proprietary property 1014 for the appropriate object. For the proprietary property 1014, a value of 0 indicates read-only, 1 indicates writable but
not commandable and 2 indicates commandable. The Priority_Array and Relinquish_Default properties are present only if the proprietary property 1014 is 2
for an individual object. By default, the proprietary property 1014 has a value of 1 (writable but not commandable) for backward compatibility with older
versions of the pCOWeb when delivered from the factory.
7.3.3 Schedules
BACnet schedules are supported and made visible through the 16 Schedule and 16 Calendar objects. For each Calendar object, there can be from 0 to 16
dates in the Date_List. For each Schedule, both the Weekly_Schedule and Exception_Schedule properties are supported. Each object's Exception_Schedule
list can have from 0 to 4 entries. Each Weekly_Schedule and each Exception_Schedule can have from 0 to 6 Time_Values. Each object's
List_Of_Object_Property_References property can have from 0 to 64 entries. External objects are not supported. Following a restart, schedules are not
executed until the pCOWeb clock has been set using a TimeSynchronization or UTCTimeSynchronization. Schedules are checked approximately every 10
seconds for a minute rollover, so scheduled values may not change until 10 to 15 seconds after the minute turns over.
7.3.4 Default Factory Settings
Default values for the pCOWeb are as follows:
Property Default Value
Device Instance 77000
LAN type 1=BACnet/IP
BACnet/IP UDP BAC0 (hexadecimal) or 47808 (decimal)
larming Enabled No
Number of Analog Variables Mapped 207
Number of Integers Variables Mapped 207
Number of Digitals Variables Mapped 207
IP Address for BBMD No
Foreign Device Time-To-Live 0 (seconds)
Table 7.d – Factory Settings
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