Filter
Top Products
Honeywell 301C User Manual
APDU_segment_timeout
The 301C dynamically instantiates BACnet objects whenever the
“Reset and Scan” operation is performed. Several objects are created
for each transmitter. The number depends on the type of transmitter.
For example each E
3
Point causes the 301C to create nine objects.
Thus the number of BACnet objects can be large – up to 869 in the
worst case of 96 E
3
Points.
One of the results of this is that the controller can be somewhat slow to
respond to external BACnet clients. Unfortunately, some BACnet
clients have a value of APDU_segment_timeout set too small for use
with the 301C controller. This is sometimes manifested as the
controller appearing to not respond to discovery requests. Therefore,
Honeywell recommends that all BACnet clients which communicate
with the 301C controller have timeouts set as listed in the table below:
Number of Transmitters
Connected to the 301C Controller
APDU_segment_timeout value (in
milliseconds) for BACnet clients which
must discover the 301C objects
0 to 10
5000
11 to 34
10,000
35 to 96
20,000
73