Vaisala HMD60 Series - Page 57

Configuration
There are several settable parameters for BACnet communication. Some parameters must be
set correct before device is connected to the BACnet network. The initial BACnet configuration
of the device is selected when ordering the device, and can be configured using Vaisala Insight
PC software, DIP switches, or BACnet protocol. Table 18 (page 55) lists the configuration
options.
Table 18 BACnet Configuration Options
Parameter DIP switches Vaisala Insight PC
Software
BACnet
MAC address
Baud Rate
Max_Master
Device object: Object
Identifier
Device object: Object
Name
Device object: Location
Device object:
Description
Reinitialize password
Protocol Services
Services are implemented according to BACnet standard. When there are options or the
standard is open for interpretations, HMD65 implementation is explained here.
Table 19 Protocol Services Implementation Notes
Protocol Service Implementation Note
Write Property Reply delay is approximately 225 ms and writing to non-volatile memory
may take time close to that.
Device Communication
Control
Limited functionality. Due to inaccurate internal clock, does not support
Device communication control with finite duration.
Unconfirmed COV
Notification
Latest_sent_value is initialized on startup. If dierence between the
sampled Present_Value and latest_sent_value is larger than
COV_INCREMENT, then US-COV is sent and latest_sent_value set to the
sampled value.
Appendix B – BACnet Reference
55