HELVAR 435 - Page 19

Helvar 435 BACnet Gateway: User Guide 15
o Address/Number: Group number, Helvar router IP Address or Helvar router IP Address
and subnet device address.
o Property: Parameter label.
o Object type: AV (analogue value – read/write),
AO (analogue output – write only), AI (analogue
input – read only) or BI (binary input– read only).
2. If necessary, remove a configuration point. Select
the corresponding row (the first column shows ),
and then press
Unmap points.
Tip: To remove all configured points, set the top
most tick box , and then press Unmap points.
Note: Check the default BACnet Object name
applied. Group parameters appear as ‘<Group
No.> <parameter name>’, router parameters
appear as ‘Router <IP address> <parameter
name>’, and subnet devices appear as ‘Load
<IP address.subnet.device address>’
<parameter name’.
3. Make sure that the Instance Number, COV and
Object Name are correct.
o If necessary, edit the Instance Number. This is
a unique object type number that identifies the
location of the BACnet point in this device. It is
derived from the Base BACnet instance
numbers (see
Configure the mapping to
BACnet object types).
Caution: A warning message appears if a duplicated
BACnet Object type, AV, AO, AI or BI instance
number is detected.
o If necessary, edit the COV (Change Of Value)
field. This value determines when the BACnet
device sends a COV message to the BACnet
client. If the value changes by 1 or more, a COV
message is sent. It is displayed as
Object
Name in the BACnet Explorer.
Value increased
by less than 1
1.00
COV
threshold
Value increased
by more than 1
COV
message
sent