Unit installation

IM 736-4 13
Integration
Access to Properties
To access a property, you must specify the object identifier including the device object identifier or
the object name including the device object name and the property identifier. See the MicroTech II
Chiller Unit Protocol Information document (ED 15062) for details.
Configuring the Unit Controller
The MicroTech II Chiller Unit Controller and BACnet Communication Module are designed,
programmed, and configured at the factory. The unit is ready to operate with the default parameter
values in the unit controller after you change the default parameter values in the HTTP Interface. If
you need to change the default values in the MicroTech II Chiller Unit Controller, see the appropriate
Operation Manual for default values and keypad operating instructions. Use the MicroTech II Chiller
Unit Controller Protocol Information document (ED 15062) for descriptions of the HTTP Interface
variables.
Network Connection
BACnet MS/TP Addressing
The BACnet MS/TP Medium Access Control (MAC) address is a variable one-octet address that
must be set during the BACnet Communication Module configuration. See your system integrator for
a MAC address. This address and two other parameters for MS/TP networks are available for
adjusting in the BACnet Configuration page (see Configure the BACnet Communication Module
section.) The MS/TP MAC address must be unique to the MS/TP network. Valid MAC addresses run
from 0 to 127.
Configure the BACnet Communication Module
The BACnet Communication Module is configured using an HTML Interface page in an HTTP
server residing in the BACnet Communication Module. You can only access the HTTP Interface via
the BACnet Communication Module Ethernet port at its IP address. In order to access this page, your
computer must be on a similar subnet as the BACnet Communication Module, which is shipped set to
a default IP subnet mask (255.255.0.0), and IP address (172.16.5.8.). You must change the network
settings on your computer to closely match the subnet. After you have configured the BACnet
Communication Module, you should restore the original network settings to your computer. The
configuration process is the same regardless of your computer’s operating system.
Figure 6 shows the HTTP Interface page. It has a total of six areas of information: three are BACnet
specific and three are network specific. The parameters that require setting depend on the data link
layer of the BAS network. Device, Date/Time, and Alarms require settings for all BACnet networks.
BACnet MS/TP networks require network settings.
Upgrading BACnet Communication Module Firmware
If an update to the BACnet Communication Module firmware is required or recommended, you must
follow all of the procedures previously described in IM 736 to verify proper installation, network
setup and configuration. Refer to the following sections: Installing a new BACnet Communication
Module, Unit Setup for BACnet Network Control, and Configure the BACnet Communication
Module.