Installation and Maintenance Manual
IM 736-5
MicroTech II®
Chiller Unit Controller
BACnet® Communication Module (MS/TP)
• WSC Water-Cooled Centrifugal, Single-Compressor
• WDC Water-Cooled Centrifugal, Dual-Compressor
• WPV Water-Cooled Centrifugal, Single-Compressor
• HSC Water-Cooled Single-Compressor Centrifugal, Heat Recovery
• HDC Water Cooled Dual-Compressor Centrifugal, Heat Recovery
• TSC Water-Cooled Single-Compressor Centrifugal, Templifier™
Group: Controls
Part Number: IM 736
Date: May 2007
Supercedes: IM 736-4
• WMC Water-Cooled Centrifugal, Magnetic Bearing
• WCC Water-Cooled Centrifugal, Counterflow
• AGZ Air-Cooled Global Scroll
• ACZ Air-Cooled Scroll Condensing Unit
• WGZ Water-Cooled Global Scroll
• AGS Air-Cooled Global Screw
• WGS Water-Cooled Global Screw
NOTICE
Use this manual to physically install the McQuay MicroTech II Communication Module into the rooftop unit
controller and connect the chiller unit controller to your network. Use the appropriate McQuay Engineering Data
(ED), known as the Protocol Information document, to integrate the unit into your network. The Protocol
Information document contains addressing details, BACnet® protocol information, and a list of the data points
available to the network. See the Reference Documents section of this manual for Protocol Information
document numbers. MicroTech II control integration literature is available from your local McQuay International
sales representative and
www.mcquay.com.
© 2007 McQuay International
Contents
Figures .................................................................................................................................................. 2
Revision History ...................................................................................................................................3
Reference Documents........................................................................................................................... 3
Limited Warranty.................................................................................................................................. 4
Introduction........................................................................................................................... 5
Recognize Safety Symbols, Words and Labels..................................................................................... 5
General Information..............................................................................................................6
Description............................................................................................................................................ 7
Application............................................................................................................................................ 7
Component Data ................................................................................................................................... 8
Connectors ........................................................................................................................................ 8
Indicators .......................................................................................................................................... 8
Baud Rate Jumpers ........................................................................................................................... 8
Installation............................................................................................................................. 9
Mounting............................................................................................................................................... 9
Installing a new BACnet Communication Module........................................................................... 9
Mounting a BACnet Communication Module.................................................................................. 9
Replacing an Existing BACnet Communication Module............................................................... 10
Unit Setup for BACnet Network Control ....................................................................................... 12
Integration............................................................................................................................ 14
Access to Properties............................................................................................................................ 14
Configuring the Unit Controller...................................................................................................... 14
Network Connection........................................................................................................................... 14
BACnet MS/TP Addressing............................................................................................................ 14
Configure the BACnet Communication Module ................................................................................ 14
Upgrading BACnet Communication Module Firmware..................................................................... 14
Changing the Network Settings ...................................................................................................... 16
Configuring the HTTP Interface..................................................................................................... 20
Service Information.............................................................................................................27
Test Procedures................................................................................................................................... 27
Replacement Parts............................................................................................................................... 27
Appendix A: Hexadecimal Conversion Table .................................................................. 28
Figures
Figure 1. Building Automation System ................................................................................................ 7
Figure 2. BACnet Communication Module External Connectors (Top View)..................................... 8
Figure 3. BACnet Communication Module Mounted in a Centrifugal Chiller Control Panel............ 11
Figure 4. Serial Card Slot in Unit Controller...................................................................................... 12
Figure 5. Serial Card Slot Detail......................................................................................................... 12
Figure 6. BACnet Communication Module HTTP Interface Page..................................................... 16
Figure 7. Successful Ping and Response............................................................................................. 20
Figure 8. Jumpers in the “Open” Position........................................................................................... 22
Figure 9. Jumpers in the “Closed” Position........................................................................................ 22
Figure 10. BACnet Communication Module Configuration Page ..................................................... 23
2 IM 736-5
Revision History
IM736-0 January 24, 2003 Initial release
IM736-1 May, 2005 Added WGS, WMC, HSC, HDC and TSC to front page and to the “Reference Documents” section
Edited part numbers in parts list
Added note in “Unit Setup for BACnet Control” section
Added note in “Changing the MSTP Data Transmission Rate” section
IM736-2 November, 2005 Added module location, power wiring, and set screen information for scroll and screw compressor
IM 736-3 June, 2006 Removed references to BACnet IP/Ethernet and moved them to I M 837
IM 736-4 October, 2006 Added new section for downloading firmware from mcquaybiz or mcquay.com
IM 736-5 May, 2007 Removed re ferences to the baud rate switch and updated with baud rate jumpers. New figures 8 & 9
chillers.
Added Table 1 and Password table.
Reference Documents
Number Company Title Source
ANSI/ASHRAE 135-
2001
IMM AGS McQuay International MicroTech II Air-Cooled Screw Chiller Installation and Maintenance
IOMM ACZ/AGZ McQuay International MicroTech II Air-Cooled Condensing Unit Installation, Operation,
IOMM ACZ1 McQuay International MicroTech II Air-Cooled Condensing Unit Installation, Operation,
IOMM AGZ1 McQuay International MicroTech II Air-Cooled Scroll Chiller Installation, Operation, and
IOMM AGZ McQuay International MicroTech II Air-Cooled Scroll Chiller Installation, Operation, and
IOMM WGZ McQuay International MicroTech II Water-Cooled Scroll Chiller Installation Manual www.mcquay.com
IOMM WPV McQuay International MicroTech II Centrifugal Chiller Installation, Operation, and
IOMM WSCWDC McQuay International MicroTech II Chiller Unit Controller Installation, Operation, and
OM AGS McQuay International MicroTech II Air-Cooled Screw Chiller Operating Manual www.mcquay.com
OM CentrifMicro II McQuay International MicroTech II Unit Controller for Centrifugal Chillers and Templifiers
ED 15062 McQuay International MicroTech II Chiller Unit Controller Protocol Information, BACnet
OM WGS McQuay International MicroTech II Water-Cooled Screw Chiller Operating Manual www.mcquay.com
OM WMC McQuay International MicroTech II Magnetic Bearing Compressor Chiller www.mcquay.com
IOMM TSC McQuay International MicroTech II Templifier Single Compressor Centrifugal Installation,
American Society of Heating,
Refrigerating and Air-Conditioning
Engineers
BACnet® A Data Communication Protocol for Building Automation
and Control Networks
Manual
and Maintenance Manual
and Maintenance Manual
Maintenance Manual
Maintenance Manual
Maintenance Manual
Maintenance Manual
Operating Manual
MS/TP and L
Operation, and Maintenance Manual
ONWORKS
®
Networks
www.ashrae.org
www.mcquay.com
www.mcquay.com
www.mcquay.com
www.mcquay.com
www.mcquay.com
www.mcquay.com
www.mcquay.com
www.mcquay.com
www.mcquay.com
www.mcquay.com
IM 736-5 3
Limited Warranty
Consult your local McQuay Representative for warranty details. Refer to Form 933-43285Y. To find
your local McQuay Representative, go to
Notice
Copyright © 2007 McQuay International, Minneapolis MN. All rights reserved throughout the world.
McQuay International reserves the right to change any information contained herein without prior
notice. The user is responsible for determining whether this software is appropriate for his or her
application.
® ™ The following are trademarks or registered trademarks of their respective companies: BACnet
from the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.;
ONWORKS and LONMARK from Echelon, Inc.; Windows from Microsoft Corporation; McQuay,
L
MicroTech II and Templifier from McQuay International.
www.mcquay.com.
4 IM 736-5
Introduction
Recognize Safety Symbols, Words and Labels
The following symbols and labels are used throughout this manual to indicate immediate or potential
hazards. It is the owner and installer’s responsibility to read and comply with all safety information
and instructions accompanying these symbols. Failure to heed safety information increases the risk
of property damage and/or product damage, serious personal injury or death. Improper installation,
operation and maintenance can void the warranty.
! CAUTION
Hazards or unsafe practice CAN result in property damage, product damage, severe
personal injury and or death.
NOTICE
Hazards or unsafe practices which CAN result in property damage, product damage, and or
personal injury.
IM 736-5 5
General Information
This manual contains the information you need to install the BACnet® Communication Module,
incorporate it into the network, and maintain it.
Electric shock hazard. Can cause personal injury or equipment damage.
This equipment must be properly grounded. Only personnel that are knowledgeable in the
operation of the equipment being controlled must perform connections and service to the
MicroTech II Chiller Unit Controller.
Static sensitive components. Can cause equipment damage.
Discharge any static electrical charge by touching the bare metal inside the control panel before
performing any service work. Never unplug cables, circuit board terminal blocks, or power plugs
while power is applied to the panel.
! WARNING
! CAUTION
NOTICE
This equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with this instruction manual, may cause interference to radio
communications. It has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial
environment. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his or her own
expense. McQuay International disclaims any liability resulting from any interference or
for the correction thereof.
6 IM 736-5
C
R
Description
Application
The BACnet Communication Module incorporates a MicroTech II Chiller Unit Controller into a
BACnet Local Area Network (LAN). It supports the BACnet MS/TP (EIA 485) data link layer
(physical layer).
The BACnet Communication Module mounts in the MicroTech II Chiller Unit Controller panel. The
BACnet Communication Module is a rectangular metal enclosure with connectors and an indicator
on the front panel.
The BACnet Communication Module connects the MicroTech II Chiller Unit Controller to the
Building Automation System (BAS) on a BACnet Local Area Network. It is the interface adapter for
the exchange of BACnet objects between the network and the unit controller. Figure 1 shows the
BACnet Communication Module and MicroTech II Chiller Unit Controller integrated into a BAS.
Figure 1. Building Automation System
24
VAC
RS-485
RS-48 5
(Isolat ed)
BACnet
Comm unication
Mo d u le
Chil ler (RS-232)
BA
Serial Card
Por t
net
Et h er n et
PW
MicroTech II
Ch i lle r Un i t Co n t r o lle r
IM 736-5 7
Component Data
Figure 2 shows the external connectors of the BACnet Communication Module.
Figure 2. BACnet Communication Module External Connectors (Top View)
Connectors
The BACnet Communication Module uses two of the connectors mounted on the top panel.
Chiller (RS232)
This connector is the interface between the MicroTech II Chiller Unit Controller and the BACnet
Communication Module.
BCM RS485 (Isolated)
This connector is the interface to the BACnet MS/TP network.
24 VAC
This connector is for the input power.
Indicators
The BACnet Communication Module has one indicator mounted on the top panel.
BCM
MCQ–3302742 Rev.___
Chiller (RS232)
BCM RS485
(Isolated)
BCM Ethernet
PWR
24VAC
PWR
This indicator lights when power is applied to the BACnet Communication Module.
Baud Rate Jumpers
Two baud rate jumpers are used to set the BACnet Communication Module data transmission rate on
an MS/TP network. The jumpers, labeled W2 and W3, are located inside of the metal enclosure. The
BACnet Communication Module ships from the factory at a default baud rate of 38400 bps. See
Changing the MS/TP Data Transmission Rate for details.
8 IM 736-5
Installation
Mounting
Installing a new BACnet Communication Module
Mounting a BACnet Communication Module
The BACnet Communication Module can be factory or field installed. The sales representative
should use the appropriate chiller selection software program in McQuayTools™ to include the
BACnet Communication Module with the unit.
For field installation, the BACnet Communication Module kit may be ordered through the McQuay
sales office or through McQuay Parts. The BACnet Communication Module kit includes the BACnet
Communication Module, cables, serial card connector, and this installation manual. The BACnet
Communication Module is also sold separately (i.e. just the module itself) through McQuay Parts.
Replacement Parts for part numbers.
See
You can add a new BACnet Communication Module to the MicroTech II control system in order to
incorporate it into an existing BACnet network.
To mount a BACnet Communication Module:
1. Remove power from the MicroTech II Chiller Unit Controller.
2. See
Table 1 for BACnet Communication Module location and mount the module. Where studs
are indicated, mount the module on the studs with the hardware included in the kit (see
Figure 3).
For other locations, drill mounting holes using the module as a template, exercising care not to
drill through to a component or wiring. Secure the module with machine screws.
Table 1. Module Location and Power Wiring
Chiller Model
AGS-B HOT>TB1-60, COM>TB1-75 Studs in control panel
AGZ-A/ACZ-A HOT>31-32, COM>21-28 Studs inside left-hand control panel door
AGZ-B/ACZ-B HOT>42-54, COM>81-84 Upper right-hand corner of control panel door
AGS-C HOT>TB1-60, COM>TB1-75 Studs in control panel
HSC HOT>UTB1-70, COM>UTB1-71 Studs on door of the unit control panel
HDC HOT>UTB1-70, COM>UTB1-71 Studs on door of the unit control panel
TSC HOT>UTB1-70, COM>UTB1-71 Studs on door of the unit control panel
WCC HOT>UTB1-70, COM>UTB1-71 Studs on door of the unit control panel
WDC HOT>UTB1-70, COM>UTB1-71 Studs on door of the unit control panel
WGS HOT>42-54, COM>81-84 Mount horizontally behind the unit controller
WGZ HOT>31-43, COM>56-60 Upper right-hand corner of control panel door
WMC HOT>UTB1-70, COM>UTB1-71 Studs on top of the panel door
WPV HOT>UTB1-70, COM>UTB1-71 Studs on door of the unit control panel
WSC HOT>UTB1-70, COM>UTB1-71 Studs on door of the unit control panel
Power Connection Terminals Mounting Location
NOTES:
a. If a range of terminal numbers is given, such as 42-54, connect to any terminal in the range.
b. The two-pin power connector wires are marked HOT and COM (common).
3. Locate the Serial Card slot on the MicroTech II Ch iller Unit Controller (see
Figure 4.)
4. Remove the cover from the Serial Card slot if it has not already been removed. Use a small
screwdriver to pry the cover off from one end.
5. Remove the plastic knock-out in the cover.
IM 736-5 9
6. Figure 5 details the Serial Card slot with the 8-pin plug that mates to the receptacle on the RS 232
Serial Interface Card. Grasp the RS 232 Serial Interface Card, with the network connector on the
underside. The 8-pin receptacle must mate to the 8-pin plug in the MicroTech II Chiller Unit
Controller. The plug has a guide on each end to direct the card into the mating guide on the
receptacle.
Note: This operation relies more on feeling the RS 232 Serial Interface Card into the connector
than seeing the connectors mate.
7. Insert the RS 232 Serial Interface Card, pointing up, into the slot, rolling it into a level position as
you move it into the slot.
8. Keeping the RS 232 Serial Interface Card level, move it in the slot until you feel the connectors
line up. The correct position seems to be level, toward the left side of the slot, and down slightly
from the top.
9. When you feel the connectors align, press the RS 232 Serial Interface Card into the connector.
Verify that it is firmly seated in the connector.
10. Replace the cover on the Serial Card slot. Slip the cover over the network connector plug.
11. Connect the BACnet Communication Module to the MicroTech II Chiller Unit Controller.
a. Plug the Serial Cable in both the RS 232 Serial Interface Card and the BACnet
Communication Module’s Chiller (RS232) connector.
b. Route the Serial Cable across the hinge and over to the BACnet Communication Module.
12. Connect power to the BACnet Communication Module.
a. Plug the power wires into the BACnet Communication Module’s 24 VAC connector and
neatly route the wires to the unit terminals as indicated in
Table , using existing raceways
and/or self-adhesive wire bases whenever possible.
13. Connect the BACnet Communication Module to the network (see
Figure 2.)
a. Route the network cable through a knockout to the appropriate connector on the BACnet
Communication Module.
14. Restore power to the MicroTech II Chiller Unit Controller.
Replacing an Existing BACnet Communication Module
To replace a BACnet Communication Module
1. Remove power from the MicroTech II Chiller Unit Controller.
2. Remove the power wires from the terminal block.
3. Locate the Serial Card slot on the MicroTech II Ch iller Unit Controller (see
4. Pull the network cable connector from the BACnet Communication Module.
5. Remove the cover from the Serial Card slot. Use a small screwdriver to pry it off from one end.
6. Grasp the RS 232 Serial Interface Card and carefully pull it from the controller.
7. Install the new RS 232 Serial Interface Card:
a. Grasp the RS 232 Serial Interface Card, with the network connector on the underside. The
8-pin receptacle must mate to the 8-pin plug in the MicroTech II Chiller Unit Controller.
The plug has a guide on each end to direct the RS 232 Serial Interface Card into the mating
guide on the receptacle.
mates to the receptacle on the RS 232 Serial Interface Card.
Note: This operation relies more on feeling the RS 232 Serial Interface Card into the
connector than seeing the connectors mate.
b. Insert the RS 232 Serial Interface Card, pointing up, into the slot, rolling it into a level
position as you move it into the slot.
Figure 5 details the Serial Card slot showing how the 8-pin plug
Figure 4.)
10 IM 736-5
c. Keeping the RS 232 Serial Interface Card level, move it in the slot until you feel the
connectors line up. The correct position seems to be level, toward the left side of the slot,
and down slightly from the top.
d. When you feel the connectors align, press the RS 232 Serial Interface Card into the
connector. Verify that it is firmly seated in the connector.
8. Replace the cover on the Serial Card slot. Slip the cover over the network connector plug.
9. Remove the BACnet Communication Module from the control panel door.
10. Mount the BACnet Communication Module on the studs with the hardware included in the kit
Figure 3.)
(see
11. Connect the BACnet Communication Module to the MicroTech II Chiller Unit Controller.
a. Plug the Serial Cable in both the RS 232 Serial Interface Card and the BACnet
Communication Module.
b. Route the cable across the hinge and over to the BACnet Communication Module.
12. Connect power to the BACnet Communication Module.
a. Plug the power wires into the BACnet Communication Module PWR connector and route
the wires per instructions on page
13. Connect the BACnet Communication Module to the network (see
10.
Figure 2.)
a. Route the network cable through a knockout and to the appropriate connector on the
BACnet Communication Module.
14. Restore power to the MicroTech II Chiller Unit Controller.
Figure 3. BACnet Communication Module Mounted in a Centrifugal Chiller Control Panel
Power Cables
BCM Serial Cable
Network Cable
Serial Card Connector
IM 736-5 11
S
Figure 4. Serial Card Slot in Unit Controller
®
Air Conditioning
Figure 5. Serial Card Slot Detail
J4
VG
VG0
Y1Y2Y3
Unit Setup for BACnet Network Control
Setup for MicroTech II Centrifugal Chiller Network Control:
1. Disable the chiller. The chiller should not be operating while performing this setup.
2. At the chiller touch screen interface panel:
a. In the SETPOINTS MODE screen, set the #9 setpoint, BAS Protocol to BACnet. Use the
Operator Password of “2001.”
b. In the SETPOINTS MODE screen, set the #3 setpoint, Control Source to Local.
3. Verify with the chiller/control company technician that the chiller is operational on BAS.
4. In the SETPOINTS MODE screen, set the #3 setpoint, Control Source to BAS.
Setup for all Other MicroTech II Chillers Network Control:
1. Set the Set Unit Setpoint screen 1 initially to Source = Keypad.
2. Change the Protocol to BACnet in the applicable menu screen shown in the table below.
erial Card Slot
8-Pin Connector
ID15H
J19
ID15
IDC15
for Serial Card
J5
Y4
ID1
ID2
ID3
ID4
ID5
ID6
ID7
12 IM 736-5
Table 2. MicroTech II Chiller Unit Controller Menu Screens
Model AGZ-A ACZ-A AGZ-B ACZ-B AGS-B AGS-C WGS WGZ
Menu Screen
Password
NOTE: Models AGZ-A/B, ACZ-A/B, and WGZ have one unit controller, while models AGS-B/C and WGS have one unit controller and
multiple circuit controllers. Unit settings for AG S-B/C and WGS models are adjusted on the unit controller.
9 6 9 7 12 14 15 10
2001 2001 2001 2001 8945 8453 8745 2001
3. Verify with the chiller/control company technician that the chiller is operational on a BAS.
4. Set the Set Unit Setpoint screen 1 to Source = Network.
IM 736-5 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, can be modified
using the BACnet Configuration page (see
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 section.)
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:
Module
Module
, Unit Setup for BACnet Network Control, and Configure the BACnet Communication
.
Installing a new BACnet Communication
14 IM 736-5
Once these steps are complete and your PC is on a similar IP address and subnet mask as the BACnet
Communication Module, follow the instructions listed below to download the firmware from the
McQuay website.
1. Go to www.mcquay.com\Products\Controls\Application Software and click on the “MicroTech
II Chiller BACnet Communication Module v1.xx Update” file.
2. Save the contents of the zip file to a selected folder on your hard drive.
3. Open the zip file from your hard drive and print this section of IM 736.
4. Verify that the BACnet Communication Module is set to the default IP address of 172.16.5.
Note: Step 4 is required so that the automatic firmware download process works properly.
5. Double click on the transfer.bat file to install the BACnet Communication Module firmware.
6. Cycle power to the BACnet Communication Module.
7. Verify that the correct BACnet Communication Module firmware version has been downloaded.
• Open Internet Explorer.
• Type the BACnet Communication Module’s IP address in the web browser.
• The BACnet Communication Module User Interface will open and you should see
“BACnet Communication Module v1.xx” text at the top of the page.
If you have any questions or concerns about the firmware download process, please contact the
McQuay Controls Customer Support Team at 1-866-4McQuay (462-7829).
IM 736-5 15
Figure 6. BACnet Communication Module HTTP Interface Page
Changing the Network Settings
The BACnet Communication Module is assigned a factory default IP address and Subnet Mask.
These are only temporary but are required so that you know where to access the BACnet
Communication Module in order to change network parameters. The BACnet Communication
Module is configured using a minimal HTTP server that is accessed using Internet Explorer®.
16 IM 736-5
Required Tools
You need the following tools to configure the BACnet Communication Module for network
operation:
• PC with Ethernet card and TCP/IP protocol.
• Internet Explorer browser.
• Ethernet Cable (Either an Ethernet crossover cable for direct connection or a standard Ethernet
cable for connecting through a hub.)
Procedure
The procedure for changing the network settings varies depending the operating system in your
computer.
You must access the HTTP Interface page at its IP address. In order to access the configuration page,
your computer must be on the same subnet as the BACnet Communication Module. Doing so will
allow you to:
1. Change the network settings on your computer and options in Internet Explorer.
2. Access the HTTP Interface page to change the BACnet Communication Module parameters.
3. Change the network settings of your computer and Internet Explorer options back to the way
they were before the configuration process.
Details regarding each of these items are described below.
To Change the IP address in the BACnet Communication Module:
Note: You can only connect to the BACnet Communication Module via the Ethernet port. To
install the BACnet Communication Module using an MS/TP (RS-485) network, you must
connect via an Ethernet cable directly to the BACnet Communication Module, then change
the settings for the MS/TP network, and finally install the BACnet Communication Module
in the MS/TP network.
1. Connect to the BACnet Communication Module via the Ethernet port.
2. Request the Subnet Mask of the network for the BACnet Communication Module from the
network administrator.
3. Request an IP address for the BACnet Communication Module from the network administrator.
4. Change the network settings on your computer to access the BACnet Communication Module.
Use the appropriate procedure below for your operating system.
5. Open the browser on your computer.
6. In the Internet Explorer, go to Tools/Internet Options/Connections/LAN Settings.
a. Note the selections for future reference.
b. Verify that Automatically Detect Settings, Use Automatic Configuration Script, and Use a
Proxy Server for Your LAN are not selected.
Note: Verify that these settings are disabled to confirm that the changes you make to the
BACnet Communication Module with the browser take effect.
7. Type http://172.16.5.8/ in the Address box of the browser and press the Enter key to access the
BACnet Communication Module.
8. Make changes to the configuration file in the BACnet Communication Module (see the
Changing the MS/TP Data Transmission Rate section.)
9. Reboot the BACnet Communication Module to change the settings.
10. In the browser on your computer:
a. Go to Tools/Internet Options/Connections/LAN Settings.
IM 736-5 17
b. Restore the settings as noted in Step 6a.
11. Restore the network settings on your computer (see following page for instructions based on
your operating system.)
Network Settings for Microsoft Windows® 95 and 98
To change the network setting in Microsoft Windows 95 and 98 computer:
1. Open the Control Panel on your computer.
2. Open the Network Applet.
3. Select the TCP/IP-Ethernet card combination on your computer.
4. Select the Properties button.
5. Select the IP Address tab.
6. Note the IP address and Subnet mask if they have values or that Obtain IP address automatically
is selected.
7. Select Specify an IP address.
8. Change the Subnet mask to 255.255.0.0.
9. Change the IP address to 172.16.X.X (where X.X is unique on the subnet but not 172.16.5.8).
10. Click the OK button.
11. Reboot your computer to change the Subnet Mask and IP address.
To restore the network setting in Microsoft Windows 95 and 98 computer:
1. Open the Control Panel on your computer.
2. Open the Network Applet.
3. Select the TCP/IP-Ethernet card combination on your computer.
4. Select the Properties button.
5. Select the IP Address tab.
6. Restore the settings noted as previously noted.
7. Click the OK button.
8. Reboot your computer to restore the original Subnet Mask and IP address.
Network Setting for Microsoft Windows NT
To change the network settings in a Microsoft Windows NT computer:
1. Open the Control Panel on your computer.
2. Open the Network Applet.
3. Select the Protocols tab.
4. Select the TCP/IP-Ethernet card combination on your computer.
5. Select the Properties button.
6. Select the appropriate adapter.
7. Note the IP address and Subnet mask if they have values or that Obtain IP address automatically
is selected.
8. Select Specify an IP address.
9. Change the Subnet mask to 255.255.0.0.
10. Change the IP address to
11. Click on the Apply button.
To restore the network settings in a Microsoft Windows NT computer:
1. Open the Control Panel on your computer.
2. Open the Network Applet.
3. Select the Protocols tab.
4. Select the TCP/IP-Ethernet card combination on your computer.
5. Select the Properties button.
172.16.X.X (where X.X is unique on the subnet but not 172.16.5.8).
18 IM 736-5
6. Select the appropriate adapter.
7. Restore the settings as previously noted.
8. Click the Apply button.
Network Setting for Microsoft Windows 2000
To change the network settings in a Microsoft Windows 2000 computer:
1. Select My Network Places on the desktop and right click.
2. Open Properties.
3. Select Local Area Connections and right click.
4. Open Properties.
5. Select TCP/IP.
6. Click on Properties button.
7. Note settings for future reference.
8. Select Use the following IP address.
9. Change the Subnet mask to 255.255.0.0.
10. Change the IP address to
11. Click OK.
To restore the network settings in a Microsoft Windows 2000 computer:
1. Select My Network Places on the desktop and right click.
2. Open Properties.
3. Select Local Area Connections and right click.
4. Open Properties.
5. Select TCP/IP.
6. Restore the network settings as previously noted.
7. Click OK.
172.16.X.X (where X.X is unique on the subnet but not 172.16.5.8).
Test Network Communications
You can determine whether your computer is properly configured to access the BACnet
Communication Module.
To test whether your computer is properly addressed to communicate with the BACnet Communication Module:
1. Open a DOS window (go to Start button\Programs\Accessories\Command Prompt.)
2. Type “ping 172.16.5.8” at the DOS prompt.
3. Press Enter.
4. Observe response. See
Figure 7 for a successful response.
IM 736-5 19
Figure 7. Successful Ping and Response
Configuring the HTTP Interface
To change the parameters in the HTTP Interface, select the Configure button at the bottom of the
HTTP Interface home page.
To Configuring the HTTP Interface:
1. Connect to the BACnet Communication Module via the Ethernet port for configuration.
2. Browse to the HTTP Interface page
3. Select the Configure button. The HTTP Configuration page opens (see
4. Enter the password. Default password is 1234.
5. Adjust the parameters for particular network.
Figure 6 shows the Configuration page in the HTTP Interface.
Figure 6
Figure 10.)
Note: The factory default setting for the BACnet Communication Module’s MS/TP data
transmission rate is 38400 bps. If this is the data transmission rate you want for your
network, skip step 6.
6. To install the BACnet Communication Module on an MS/TP network, set the Data Transmission
Rate switch to the data transmission rate of your network. (see
Transmission Rate
section.) Select the Change or Reboot button to set the changes into the
Changing the MS/TP Data
BACnet Communication Module. You only need to reboot for the parameters that indicate a
reboot is necessary.
7. Select the Home button to return to the HTTP Interface page.
8. Verify that the changes were made. If the changes were not made, verify that the LAN Settings
are not selected in Internet Explorer.
9. Close your browser.
10. Remove the connection to Ethernet port you made in Step
1.
Changing the MS/TP Data Transmission Rate
Two jumpers are used to set the BACnet Communication Module data transmission rate (i.e. baud
rate) on an MS/TP network. The jumpers are located inside of the metal enclosure. The BACnet
Communication Module ships from the factory at a default baud rate of 38400 bps. To change the
baud rate to 9600 or 19200 bps, follow the instructions below. In addition to setting the two
jumpers, you must also set the baud rate on the HTTP interface. After you set baud rate, verify that
you have removed the Ethernet cable from the BACnet Communication Module so that MS/TP
communications can proceed efficiently.
20 IM 736-5
! WARNING
Electric shock hazard. Can cause personal injury or equipment damage.
This equipment has exposed electrical connections inside BACnet Communication Module.
Only personnel that are knowledgeable in the operation of this equipment must perform
connections and service to the BACnet Communication Module.
To Change the MS/TP Data Transmission Rate:
Note: The current version of the BACnet Communication Module ships with two jumpers for
setting the transmission (baud) rate. Older versions of the BACnet Communication
Module used a switch for this purpose. Refer to IM 736-4, available on
www.mcquaybiz.com, for changing the baud rate via the switch.
1. Remove power from the BACnet Communication Module.
2. Remove the four screws that secure the cover to the BACnet Communication Module and lift the
cover.
3. Locate the two jumpers, labeled W2 and W3, inside of the metal enclosure.
Note: The BACnet Communication Module ships from the factory at a default baud rate of
38400 bps. (i.e. the jumpers are in the high or “open” position with the plastic covers
removed.) Figure 8 shows the inside of the BACnet Communication Module when the
cover is removed and the jumpers are at the “open” position.
4. To change the baud rate to 9600 or 19200 bps, set the jumpers to the low or “closed” position by
placing the plastic covers entirely over both jumpers as shown in Figure 9.
5. Replace the cover and the four screws that secure the cover.
6. Restore power to the BACnet Communication Module.
IM 736-5 21
Figure 8. Jumpers in the “Open” Position
W3
W3
Figure 9. Jumpers in the “Closed” Position
W2
W2
W3
W2
22 IM 736-5
Changing Parameters in the HTTP Interface Page
Password
In order to change any parameters, you must enter a password in the Configuration pag e. The initial
password is 1234. You can change this password by following these steps: enter your password,
enter the new password, and reboot.
Figure 10. BACnet Communication Module Configuration Page
IM 736-5 23
Configurable Parameters
Table 3 defines the configurable parameters of the BACnet Communication Module in the same
order as they appear on the HTTP Configuration page (see
required for you network.
Figure 10). Change parameters as
24 IM 736-5
Table 3. Configurable Parameters
Section Parameter Value (Range)/Definition Initial Value/Note
Password
Device
Date/Time
Alarms
Password Enter the password before
changing any parameters on this
page.
New Password You can change the password;
enter the new password here.
Device Instance 0-4194303/Device Instance of the
BACnet Communication Module
LAN Type MS/TP BACnet/IP
Client Timeout Normal or Busy Network/The time
the BACnet Communication
Module waits for a response to a
ConfirmedEventNotification.
Who Is Frequency Limits the frequency, in minutes,
of Who Is requests the BACnet
Communication Module issues.
Reinit Password Password that allows the BACnet
Communication Module to be
reinitialized from the network.
Year Current Year
Month (1..12) Current Month
Day (1..31) Current Day
Hours (0..23) Current Hours
Minutes (0..59) Current Minutes
Seconds (0..59) Current Seconds
UCT Offset (-720..720) Difference, in minutes, of the
Universal Coordinated Time and
local time.
Daylight Savings? Yes or No No/Must be set to No for a BACnet
Set New Time? Yes or No No/If the network does not have a
Enabled? Yes or No/Enabling this feature
provides alarm annunciation from
the BACnet Communication
Module to a BACnet Client.
BACnet Clients can also poll
variables in BACnet
Communication Module for alarm
information. See the Protocol
Information document (ED 15062)
for details.
Alarm Destination Device Instance 0-4194303/Device Object of the
BACnet device that receives the
alarm notification.
Alarm Destination Process ID Process ID used at the receiving
BACnet device to determine the
response action to the alarm
notification.
Problem Priority (0..255) Priority for Problem Alarms 0
Fault Priority (0..255) Priority for Fault Alarms 0
Warning Priority (0..255) Priority for Warning Alarms 255
1234
3000/This must be unique
throughout the entire BACnet
network.
Normal/Setting to Normal gives
ADPU timeout = 3000ms. Setting
to Busy Network gives ADPU
timeout = 10000 ms.
1 (per minute)
Blank/Blank indicates no password
is required. If a password is
entered, a password is required
before a BACnet client can
reinitialize this BACnet
Communication Module.
If the network has a BACnet Time
Master the Time and Date
parameters are set automatically.
client to synchronize the time on
the network.
BACnet Time Master, you must set
the time manually.
No/Yes enables the BACnet
Communication Module to send a
ConfirmedEventNotification
message to a single BACnet device
whenever an alarm occurs in the
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.
1
1/May be changed to suit the BAS
preference.
IM 736-5 25
Section Parameter Value (Range)/Definition Initial Value/Note
MS/TP
MAC address
Max Masters Maximum Number of Master
Max Info Frames Maximum Number of Information
Baudrate 9600 bps, 19200 bps, and
0-127/Media Access Control
Address (unique hardware address)
of the BACnet Communication
Module.
Controllers currently on the
network that the BACnet
Communication Module can poll.
Frames the BACnet
Communication Module can send
before it must pass the token.
38400 bps/Data Transmission rate
on the MS/TP network
1/See the BAS systems integrator.
This value must be entered as a
hexadecimal value. See
A: Hexadecimal Conversion
28.
page
127 Master Controllers/ See the
BAS system integrator. BAS
integrators can decrease this value
to improve network performance.
5 Frames
38400 bps/ See the BAS system
integrator. Be sure to set the
Switch to the correct position.*
Appendix
on
*Although 76800 bps selectable, it is not a valid speed.
26 IM 736-5
Service Information
Test Procedures
If you can control the unit from its keypad, but you are not able to communicate with unit via the
network:
• Check the network wiring.
• Verify that the jumpers are set correctly for the desired baud rate (see the
Data Transmission Rate
• Check communications.
• Use the standard TCP/IP suite of protocols to check your connectivity with other devices.
For example, type “ping <IP address of the MicroTech II BACnet Communications
Module>.” If you get a response from that IP address, you are connected to the BACnet
Communication Module.
If the BACnet Communication Module still does not respond, call the McQuay Controls Customer
Support group at 866-4MCQUAY (866-462-7829).
Replacement Parts
Changing the MS/TP
section for details.)
Description Part Number
MicroTech II BACnet Communication Module-MS/TP kit 350147404
MicroTech II BACnet Communication Module, no RS 232 Serial
Interface Card
MicroTech II BACnet Communication Module Serial Cable (72 in.) 330274204
RS 232 Serial Interface Card 330343102
Connector-Wago 330803003
Tool-Wago Connector 330803050
330274201
IM 736-5 27
Appendix A: Hexadecimal Conversion Table
Dec Hex Dec Hex Dec Hex Dec Hex
0 0 32 20 64 40 96 60
1 1 33 21 65 41 97 61
2 2 34 22 66 42 98 62
3 3 35 23 67 43 99 63
4 4 36 24 68 44 100 64
5 5 37 25 69 45 101 65
6 6 38 26 70 46 102 66
7 7 39 27 71 47 103 67
8 8 40 28 72 48 104 68
9 9 41 29 73 49 105 69
10 A 42 2A 74 4A 106 6A
11 B 43 2B 75 4B 107 6B
12 C 44 2C 76 4C 108 6C
13 D 45 2D 77 4D 109 6D
14 E 46 2E 78 4E 110 6E
15 F 47 2F 79 4F 111 6F
16 10 48 30 80 50 112 70
17 11 49 31 81 51 113 71
18 12 50 32 82 52 114 72
19 13 51 33 83 53 115 73
20 14 52 34 84 54 116 74
21 15 53 35 85 55 117 75
22 16 54 36 86 56 118 76
23 17 55 37 87 57 119 77
24 18 56 38 88 58 120 78
25 19 57 39 89 59 121 79
26 1A 58 3A 90 5A 122 7A
27 1B 59 3B 91 5B 123 7B
28 1C 60 3C 92 5C 124 7C
29 1D 61 3D 93 5D 125 7D
30 1E 62 3E 94 5E 126 7E
31 1F 63 3F 95 5F 127 7F
28 IM 736-5
This document contains the most current product information as of this printing. For the most current product
information, please go to www.mcquay.com. All McQuay equipment is sold pursuant to McQuay’s Standard
Terms and Conditions of Sale and Limited Warranty.
(763) 553-5330 • www.mcquay.com
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