IM702-3
15
Commissioning the Network
Pressing the service pin, switch SW1, generates a service pin message, which contains the Neuron ID and the program code
identification of the node. A service pin message is a network message that is generated by a node and broadcast on the
network. It can be used to commission the LonWorks network.
A network configuration tool maps device Neuron IDs to the domain/subnet/node logical addressing scheme when it creates
the network image, the logical network addresses, and connection information for all devices (nodes) on the network.
Ex
ternal Interface File (XIF)
LonMark guidelines specify exact documentation rules so that proprietary configuration tools are not required to
commission and configure LonWorks devices. The MicroTech II LonWorks Communications Module is self-documenting
so that any network management tool can obtain all the information needed over the network to connect it into the system
and to configure and manage it. An external interface file (a specially formatted PC text file with an extension .XIF) is also
available so that any network tool can design and configure it prior to installation. For a copy of the XIF file contact your
local McQuay International representative.
Configuring the Unit Controller
All MicroTech II Main Control Boards for Rooftop and Self-contained units are loaded with software and configured at the
factory for stand-alone unit operation. The unit is ready to operate in a stand-alone manner with default set point parameters
that can be changed with the unit’s keypad/display or via a network signal. See the appropriate operation manual for the
default values and keypad/display operating instructions. See the appropriate MicroTech II Protocol Information Data for
descriptions of the available network variables. See Reference Documents for manual numbers.
There are 12 communication parameters involved in setting up the unit controller for proper communication with the
various communication module options (BACnet IP, BACnet MS/TP or LON). These parameters are set differently by the
factory depending on which communication module is ordered and shipped with the unit. The table below lists the four
possible sets of default parameter settings. Not all the parameters apply to all the module options. The entries in the table
that are shown in
bold
font apply to a particular module option.
If unit is equipped with a factory installed LONWORKS communication module (DAC or SCC) the controller is configured
as shown in the table. These parameters do not require field modification. If a LONWORKS module is added in the field to
a unit that shipped with no module or a BACnet module is removed and a LONWORKS module is installed in the field,
refer to the table to determine whether or not changes are required to communication setup parameters.
Note:
The PC based McQuay MicroTech II ServiceTools is required to modify these parameters.
