ComprehensIve daTa Tables
www.DaikinApplied.com 13 ED 15103-6 • MICROTECH III WSHP UNIT CONTROLLER
Table 7: Device Objects - Ennity Single Stage Compressor
Point Name
Object
Type/
Instance
Read/
Write
Access
2
BACnet Object
Name
Range/Default
(in Units)
Non-
volatile
Memory
1
Description
DEVICE
Description Device W Description 32 Characters Y
Text string. Property can be changed through the BACnet
conguration menu or BAS. See BACnet Conguration and
Commissioning.
Instance Device W Object_Identier 1 to 4194302 Y
Unique instance number or object-identier assigned by
integrator. See BACnet Conguration and Commissioning.
Location Device W Location 32 Characters Y
Text string that can be changed through the BACnet
conguration menu or BAS. See BACnet Conguration and
Commissioning.
Name Device W Object_Name 32 Characters Y
The following applies when changes are made through
the BACnet conguration menu: If a period “.” is
entered as the rst character then the name is set to
“MTIIIUC_WSHP_0000000” and the zeros are set to the
device instance. If a space character is entered as the
rst character, then the Device Instance is automatically
lled in at the rst 0 (zero) character in the name. For
example: Assume the Instance has been changed to
321. If the name was previously “WSHP_0000300” and
a space is entered at the name prompt, the new name
automatically lls in as “WSHP_0000321”. If a period is
entered at the name prompt, the new name changes to
“MTIIIUC_WSHP_0000321”.
Software Identication Device R Firmware_Revision 32 Characters N The software version of the communication module rmware.
Unit Application Version Device R
Application_
Software_Version
32 Characters N The software version of the unit controller.
MaxMasters Device W Max_Master
1 to 127
Default: 127
Y
MaxMasters should be set to the highest address of a
MS/TP master on the network segment. The default value
is 127 for maximum compatibility. Setting this to the highest
address of an MS/TP master device on the network reduces
the MS/TP token trafc and decreases the response time
of the unit controller. MaxMasters can be set from the
BAS or from the BACnet conguration menu. See BACnet
Conguration and Commissioning.
MS/TP Baud Rate NA NA NA
9600, 19200,
38400, 76800
Default: 38400
Y
Set the baud rate to match the speed of the BACnet
network. Speeds above 38400 should be avoided unless
the network wiring has been tested and veried to meet
the required speed. The baud rate must be set using the
BACnet conguration menu. See BACnet Conguration and
Commissioning.
1. Parameter is stored in FLASH/EEPROM (non-volatile memory) in either the communication module or in the unit controller. If Non-volatile Memory = Y, then the
value is saved through a power cycle. Writes to this parameter must be limited. If Non-volatile Memory = N, the value is not saved through a power cycle.
2. R = Read Only, W = Writeable, C = Commandable
3. The values of the individual Occupancy Temperature Setpoints (AV1 to AV6) must be kept in ascending order as follows:
AV6 <= AV5 <= AV4 <= AV1 <= AV2 <= AV3
4. AV412 has an ObjectName of SystemMinInstance, the Present Value is writeable, and it has a default value of 3101000. During the commissioning process, the
present value of AV412 is added to the MAC Address to determine the Device Instance Number. In order to change the value of AV412 on the BACnet communication
module in the uncongured state, the BAS must broadcast a new present value to AV412 using the BACnet service (BIBB – BACnet Interface Building Block) called
“Unconrmed COV” with a ProcessID value of 1. This prevents unauthorized unconrmed writes, or changes, to AV412. Note that this change affects the AV412
present value for every MicroTech III WSHP BACnet communication module on the trunk.
5. The auto-addressing feature was designed for units communicating to a Daikin Intelligent System (IS) Manager. However, any BAS can congure a MicroTech
III WSHP unit controller with BACnet communication module for auto-addressing. AV412 can be set via the BAS using auto-addressing, but this feature is intended
primarily for the IS controller. See the Daikin System Manager Operation Manual, OM 1254, and the MicroTech III BACnet MS/TP Communication Module Installation
Manual, IM 928, both available on www.DaikinApplied.com, for complete details on using auto-addressing with the IS controller.
6. Analog Null is a discrete temperature value of 621.806ºF/327.67ºC. Its purpose is to indicate a sensor failure condition or when the unit controller is not using that
temperature value.
7. After Receive Heartbeat is enabled, this variable reverts to the default (non-override) value if it is not refreshed often enough through a network command or if
communication is disabled (i.e. BACnet device communication control = disable).
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