SKG4 Gas Fired Humidifier
BACnet Communication Module User Guide
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Introduction
The SKG4 Gas Fired Humidifier BACnet Communication Module User Guide provides information about using the
humidifiers with BACnet communications feature. The BACnet communication protocol for building automation and
control networks enables communication between client devices within a network. The humidifier provides a BACnet
network interface between BACnet client devices and Neptronic humidifiers. It uses the BACnet Master Slave/Token
Passing (MS/TP) protocol and BACnet IP at the BACnet MAC layer.
Pre-requisites
The BACnet communication user guide assumes that you are familiar with the concepts of BACnet and its
terminology.
Advantages of BACnet
BACnet enabled humidifiers have the following advantages:
•
Quick Message Transmission.
The humidifier uses a synchronous implementation for BACnet messages
making it quick and efficient. Each BACnet confirmed service request is answered as quickly as possible
without using the
Reply Postponed
frame. The MS/TP implementation is performed within
Tusage_delay
of
15 minutes to ensure a
Tusage_timeout
value within 20 minutes.
•
MS/TP Support.
The humidifier supports a Full Master Node state machine for MS/TP. The Max_Master and
the instances are configured to the device object through
BACnet WriteProperty
service or via the device's
Programming Mode. The MAC address and the MS/TP baud rate setting of 9600, 19200, 38400, and 76800
are also set through the
BACnet Write Property
service or via the device's Programming Mode. In
Programming
mode, the device is configured through the device’s keypad. For more information about the
WriteProperty, refer to Table 3 - Object Types Supported.
•
BIBB Support
. The humidifier functions the same way as the B-ASC type profile server and supports the
specific BIBB as per their relevant definitions.
o
DS-RP-B
o
DS-RPM-B
o
DS-WP-B
o
DS-WPM-B
o
DM-DCC-B
o
DM-DDB-B
o
DM-DOB-B
o
DM-RD-B
o
DM-TS-B
o
DM-UTC-B
o
DS-COV-B
o
DS-COVP-B
o
SCHED-WS-I-B
•
Object Support
. The humidifier supports a fixed list of BACnet visible values, which appear as Present_Values
of various BACnet standard object types in addition to a device object. For more information, refer to Table 3 -
Object Types Supported.
•
Alarms
. The humidifier supports indication of various alarm conditions through value changes in properties of
several objects. However, it does not generate BACnet event notifications.
