Daikin MicroTech II Installation And Maintenance Manual

ED 15062-7 • MICROTECH II CHILLER CONTROLLER 10 www.DaikinApplied.com
basIC ProToCol InformaTIon
LONWORKS Networks
LONWORKS technology, developed by Echelon Corporation,
is the basis for LONMARK Interoperable Systems. This
technology is independent of the communication media. The
LONMARK Interoperable Association has developed standards
for interoperable LONWORKS technology systems. In
particular they have published standards for HVAC equipment
including the Chiller Functional prole. This prole species a
number of mandatory and optional standard
s and standard conguration parameters. This manual denes
the variables and parameters available in the MicroTech II
Chiller Unit Controller.
Compatibility
The MicroTech II Chiller Unit Controller, along with the
LONWORKS Communication Module, operates in accordance
with the Chiller Functional prole of the LONMARK
Interoperability Association.
LONWORKS Variables
The MicroTech II Chiller Unit Controller incorporates
LONWORKS network variables to access unit data points.
The controller uses LONWORKS Standard Network Variable
Types (SNVT) from the prole. Some data points can be
adjusted (input network variables, nvi) (read/write attributes,
e.g., setpoints) from the network and others can only be
interrogated (output network variables, nvo) (read only
attributes, e.g., status information). Conguration variables
(nci) are included with the input network variables.
Each data point accessible from a LONWORKS network is
described with a table that gives the LONWORKS Name,
Prole, SNVT Type, and SNVT Index. If the variable is a
conguration variable the table also includes the SCPT
(Standard Conguration Parameter Type) Reference and the
SCPT Index.
Example of LONWORKS Data Point
LONWORKS Name Prole SNVT Type SNVT Index SNVT Size
nvoSuctionTemp Proprietary temp_p 105 two bytes
LONWORKS Name
Each network variable has a name that you use to access
the data point. This is the name of the variable from the
prole. In the example above, the name of the variable is
nvoSuctionTemp.
Prole
The prole column designates whether the variable is dened
in the LONMARK Chiller functional prole or is a proprietary
variable. The variable itself may not be a standard component
of the prole, but the unit controller implements it and it is
available to the network.
SNVT Type
This column gives the name of the standard network variable
type from the master list. In the example above, the SNVT is
SNVT_temp_p.
SNVT Index
This column gives the Index of the standard network variable
type from the master list. In the example above, the SNVT
Index is 105.
SNVT Size
This column gives the size of the standard network variable
type in number of bytes. In the example above, the SNVT Size
is two bytes.
SCPT Reference
This column gives the name of the Standard Conguration
Parameter Type (SCPT) from the master list.
SCPT Index
This column gives the Index of the Standard Conguration
Parameter Type (SCPT) from the master list.

Daikin MicroTech II Specifications

General

Brand	Daikin
Model	MicroTech II
Category	Controller
Language	English