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Network Configuration
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IM 837-2 • MICROTECH II CHILLER UNIT CONTROLLER
Table 4:
BACnet Configuration Properties
Property/Parameter
Value (Range)/Description
Default Value/Notes
Device
BACnet LAN Type
BACnet IP or BACnet Ethernet/Indicates the Data
Link and Physical layers of the BAS network.
BACnet IP
BACnet IP/UDP
(User Datagram Protocol) Port
Identifies the application process in the
communication module.
47808 (Decimal)
BAC0 (Hex)
Device Instance
0-4194303/Device Instance of the communication
module.
3000/This must be unique throughout the
entire BACnet network.
Description
This property describes the application running in
the communication module.
Location
This changeable property indicates the physical
location of the chiller.
APDU Timeout
The amount of time, in milliseconds, between
retransmissions of an APDU requiring
acknowledgment for which no acknowledgement
has been received.
3000 Milliseconds
Number of APDU Retries
The maximum number of times that an APDU can
be retransmitted.
Three times
Password for Restart
Password that allows the communication module
to be reinitialized from the network.
1234/Blank. Indicates that no password
is required. If a password is entered, a
password is then required before a BACnet
client can re-initialize the communication
module.
Metric Units
Yes or No/ Selecting Yes converts the Units and
Relinquish Default properties to Metric units.
Selecting No converts these properties to English
units.
No/Changing this property does not affect the
Present Value property read from the chiller.
For centrifugal chillers, the units can be
changed via the keypad.
Network Addressing
IP Address
IP Address of the communication module.
172.16.5.8
Subnet Mask
Subnet Mask of the communication module.
255.255.0.0
Alarms
Alarming Enabled
Yes or No/Enabling this feature provides alarm
annunciation from the communication Module
to a BACnet client. BACnet clients can also poll
variables in a communication module for alarm
information.
No/Selecting Yes enables the communication
module to send a ConfirmedEventNotification
message to a single BACnet device whenever
an alarm occurs in the MicroTech II Chiller.
This message has an Event Type = Complex
Event and has proprietary properties in its
Event Values section. Not all BACnet devices
can accept this message.
Alarm Destination
Device Instance
0-4194303/Device Object of the BACnet device
that receives the alarm notification.
1
Alarm Process ID
The process used by the receiving BACnet device
to determine the response action to the alarm
notification.
1/May be changed to suit the BAS
preference.
Alarm Priority
Priority for Problem Alarms (0-255)
0/The lower the priority value, the higher the
actual alarm priority.
Alarm Fault Priority
Priority for Fault Alarms (0-255)
0/The lower the priority value, the higher the
actual alarm priority.
Alarm Warning Priority
Priority for Warning Alarms (0-255)
255/The lower the priority value, the higher
the actual alarm priority.
Clock Parameters
Daylight Saving Time
Yes or No
No/Must be set to No for the communication
module
to synchronize the time on the
network. Setting clock parameters is only
necessary when the BAS network does not
have a Time Master controller on the network.
The clock must be reset any time power is
lost to the chiller or if the communication
module is rebooted.
UCT Offset
Difference in minutes of the Universal Coordinated
Time and local time ( –720 to + 720).
0 Minutes
Interval to send WhoIs
The maximum frequency, in minutes, at which the
communication module sends WhoIs Requests.
1 Minute
BBMD Parameters
IP Address for BBMD
IP Address for the BACnet Broadcast Management
Device (BBMD) if used.
None
Time-To-Live for Foreign
Device Registration
The time, in seconds, within which the foreign
device must re-register with the BBMD. If it does
not re-register, the BBMD removes it from its
Foreign Device Table (FDT) and discontinues
forwarding messages to the foreign device.
0 Seconds
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