McQuay IM 689-2 Installation & Maintenance Data

Category
Networking
Type
Installation & Maintenance Data
Installation & Maintenance Data
IM 689-2
Group:
McQuay
Controls
Part Number:
629952Y
Date:
January 2001
©2001 McQuay International
MicroTech
®
BACdrop
Gateway
BACnet™-to-MicroTech Communications Gateway
2
IM 689-2
Contents
Introduction .......................................................................................................................................... 4
General Description
........................................................................................................................ 6
Component Data................................................................................................................................... 6
Single Board Computer ................................................................................................................... 6
Power Supply................................................................................................................................... 7
BACdrop Software ............................................................................................................................... 8
BACdrop Program........................................................................................................................... 8
Point Mapping File (PMF)............................................................................................................... 8
Configuration File............................................................................................................................ 8
Applying the BACdrop Gateway ......................................................................................................... 8
MicroTech Supervisory Controllers and the Level-2 BACdrop ...................................................... 9
Monitor Software and BACdrop.................................................................................................... 10
Installation
....................................................................................................................................... 11
Panel Location and Mounting............................................................................................................. 11
Field Wiring........................................................................................................................................ 12
Power............................................................................................................................................. 13
MicroTech Network Communications........................................................................................... 13
Network Commissioning.................................................................................................................... 15
About the Network Address .......................................................................................................... 16
Preparing an Address Schedule ..................................................................................................... 17
Commissioning Overview ............................................................................................................. 19
Task 1: Configuring the BACdrop Gateway.................................................................................. 19
Task 2: Configuring a Level-1 MicroTech Supervisory Controller ............................................... 20
Task 3: Verifying the Integrity of the Communications Trunk ...................................................... 21
Task 4: Connecting the BACdrop Gateway to the Trunk .............................................................. 22
Task 5: Connecting the Controllers and Verifying Communications............................................. 23
BACdrop Setup Wizard User’s Guide
....................................................................................... 29
System Requirements ......................................................................................................................... 29
Installing the BACdrop Setup Wizard................................................................................................ 30
Starting the BACdrop Setup Wizard .................................................................................................. 30
Working With the BACdrop Gateway................................................................................................ 31
System Information Tool ............................................................................................................... 32
Configure Controller List Tool ...................................................................................................... 33
Configure Network Numbers Tool ................................................................................................ 35
Download Tool .............................................................................................................................. 36
Write Configuration to File (Backup) Tool.................................................................................... 36
Read Configuration From File (Restore) Tool............................................................................... 36
Change Timing Parameters Tool (Advanced Users Only)............................................................. 37
Working With the MicroTech Network Through the BACdrop Gateway .......................................... 37
BACnet Network Diagnostic Tool................................................................................................. 39
Network Read/Write Tool.............................................................................................................. 40
Working With MicroTech Controllers................................................................................................ 41
MicroTech Controller Configure Tool........................................................................................... 42
Working With the MicroTech Network Through an RS-232 to RS-485 Converter............................ 43
MicroTech Network Diagnostic Tool ............................................................................................ 44
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3
Service Information
....................................................................................................................... 45
Wiring Diagram .................................................................................................................................. 45
Testing Guidelines .............................................................................................................................. 45
Troubleshooting Power Problems .................................................................................................. 45
Troubleshooting Network Communications Problems .................................................................. 46
Troubleshooting the SBC............................................................................................................... 47
Jumper Settings................................................................................................................................... 47
Ethernet Status LEDs.......................................................................................................................... 50
Parts List............................................................................................................................................. 50
McQuay, AAF, and MicroTech are registered trademarks of McQuay International.
BACdrop, Monitor, and Open Protocol are trademarks of McQuay International.
All other trademarks are the property of their respective owners.
4
IM 689-2
Introduction
The MicroTech® BACdrop™ gateway integrates a MicroTech network into a BACnet™ building
automation system (BAS) so that you can monitor and control McQuay International equipment from
the BAS. The gateway translates between BACnet objects on an Ethernet® network and McQuay
memory locations on a proprietary MicroTech network.
Each BACdrop gateway can support up to 63 MicroTech controllers. No modifications to MicroTech
hardware or software are necessary. Most standard MicroTech unit and supervisory control
applications are supported (see Table 1).
This manual describes BACdrop components, field-wiring requirements, commissioning procedures,
and service procedures. Point mapping information for standard MicroTech control applications is
provided in a separate series of BACnet Data Information Packet (BDIP) documents. In addition to
point mapping data, the BDIP documents include references to MicroTech unit controller installation
and operation literature that may be needed to engineer a BAS application. Two BACnet Protocol
Implementation Conformance Statement (PICS) documents are also available. See Table 1 below.
All BACdrop-related literature is available to the public through the McQuay International bulletin
board system called McQuay OnLine. The latest BACdrop software updates are also made available
(at no charge) through McQuay OnLine. For access to McQuay OnLine, contact the McQuay
Controls group in Minneapolis.
Table 1. Related BACdrop Literature
Description
Document
BDIP for MicroTech air-cooled screw chiller applications (type ALS) BD 01
BDIP for MicroTech water cooled screw chiller applications (types WHS, PFS-B, PFS-C) BD 02
BDIP for MicroTech scroll chiller applications (type AGZ) BD 03
BDIP for MicroTech large-tonnage water cooled screw chiller applications (type PES with J&E Hall
compressor)
BD 04
BDIP for MicroTech series-100 centrifugal chiller applications; includes MicroTech Lead-Lag/Load
Balance (LLLB) controller
BD 05
BDIP for MicroTech series-200 centrifugal chiller applications BD 06
BDIP for MicroTech reciprocating chiller applications (U.S. models only) BD 07
BDIP for MicroTech self-contained air conditioning applications BD 08
BDIP for MicroTech applied rooftop system applications BD 09
BDIP for MicroTech unit ventilator applications BD 10
BDIP for MicroTech Remote Monitoring and Sequencing Panel (RMS) BD 11
BDIP for MicroTech Remote Monitoring and Control Panel (RMC) BD 12
BDIP for MicroTech Chiller System Controller Panel (CSC) BD 13
PICS for BACdrop gateway PICS-BAC
PICS for MicroTech virtual BACnet controllers PICS-MT
!
WARNING
Electric shock hazard. Can cause personal injury or equipment damage.
This equipment must be properly grounded. Connections and service to the MicroTech control
panel must be performed only by personnel that are knowledgeable in the operation of the
equipment being controlled.
!
CAUTION
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.
IM 689-2
5
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 689-2
General Description
The BACdrop gateway is an embedded-PC controller that translates between the standard BACnet
protocol (ANSI/ASHRAE Standard 135-1995) and the proprietary MicroTech protocol. It makes
controllers on a MicroTech network appear as BACnet nodes offering BACnet services so that
application-level data communication between the two networks is possible. The physical layer of the
BACnet side of the gateway must be ISO 8802-3 (Ethernet), 10BaseT. The MicroTech side appears
as BACnet riding on ISO 8802-3.
The BACdrop gateway is a passive device. It receives, translates, and re-transmits messages
including both data and control signals from one network to the other network in either direction. It
does not perform any supervisory control for the various MicroTech controllers connected to it. After
a BACdrop gateway is set up, no further adjustments are usually necessary unless you change the
network configuration.
Using the BACdrop gateway as an interface, the BACnet BAS is able to perform the following
supervisory functions for MicroTech unit and auxiliary controllers:
Set the operating mode
Monitor most controller inputs, outputs, setpoints, parameters, and alarms
Set most controller setpoints and parameters
Clear alarms
For details on available MicroTech controller parameters and capabilities, refer to the BDIP
documentation (see Table 1) and consult with a representative of the BAS company. For details on
specific BACnet features (services, objects, character sets, etc.) that BACdrop supports, refer to the
two BACnet Protocol Implementation Conformance Statements (see Table 1).
Component Data
Figure 1 shows the physical layout of the BACdrop panel. The major components of the gateway are
a single board computer (SBC), which includes an onboard 10BaseT Ethernet port, and a power
supply (PS) with a circuit breaker (CB). The circuit breaker can be used as an on-off switch for the
panel.
Single Board Computer
The single board computer (SBC) is an embedded PC that contains a 386SX, 33 MHz microprocessor
and 4 Mb of RAM. It is programmed to receive, translate, and re-transmit data and control signals
across the BACdrop gateway in either direction. The SBC’s operating system is ROM-DOS, which is
an MS-DOS 6.22 compatible ROM-based operating system for embedded PCs. Instead of a hard
disk, the SBC uses a 512 kb flash memory chip to store its programs and data files.
The SBC has an integrated NE2000 Ethernet controller that serves as the interface between the
BACdrop gateway and a Local Area Network (LAN) or BAS. The Ethernet controller has four status
LEDs. See the “Service Information” portion of this manual for more information on their locations
and indications.
Communication Ports
The BACdrop gateway has three communication ports, which are labeled “Ethernet,” “Network,” and
“PC.” These are all connected to communications ports on the SBC via internal factory wiring.
Ethernet Port:
The “Ethernet” port provides a connection to an Ethernet network conforming to the
ISO 8802-3, 10BaseT standard. The field connection point is an RJ-45 receptacle on the side of the
panel.
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7
Network Port:
The “Network” port provides an RS-485 connection to the MicroTech network. The
communications rate is 9600 bps. The field connection point is a 3-post terminal strip on the side of
the panel.
PC Port:
The “PC” port provides an RS-232C connection point for a PC. The communications rate
is 9600 bps. The field connection point is a standard DB9 female receptacle on the side of the panel.
To connect the BACdrop gateway to the PC, use a standard serial cable (not a null modem cable).
Figure 1. Control Panel Layout
CB
PS
SBC
J1 connector
RJ-45
J22
L2
L1
GRD
“Ethernet” port
“Network” port
“PC” port
Flash memory chip
Ethernet status LEDs
Speaker
5 Vdc power in
Power Supply
The BACdrop gateway’s power supply (PS) requires a 100 – 240 Vac, 50/60 Hz power source. The
power supply furnishes 5 Vdc power to the SBC.
8
IM 689-2
BACdrop Software
The BACdrop gateway contains three files that allow it to perform its data translation functions:
BACdrop program
Point mapping file (PMF)
Configuration file
The BACdrop program and the point mapping file are downloaded into each BACdrop gateway at the
factory. New versions of either file can easily be downloaded in the field using a PC that contains the
BACdrop Setup Wizard software. New releases of BACdrop software will be made available (at no
charge) on the McQuay International bulletin board system called McQuay OnLine. For access to
McQuay OnLine, contact the McQuay Controls group in Minneapolis.
BACdrop Program
The BACdrop program is automatically loaded when the SBC boots. The program is contained in a
single executable file. The naming convention for the BACdrop file is, for example, BDRPv157.exe.
The “v157” indicates version 1.57.
Point Mapping File (PMF)
The PMF includes specific point mapping information for MicroTech control applications. For each
point in the PMF, a proprietary memory location for a MicroTech control application is associated
with a BACnet object type, object name, and instance number. Conversion factors and other data
such as engineering units and binary state labels are also included.
The standard PMF contains all currently supported standard MicroTech control applications. See
Table 1 for a listing. The naming convention for the standard PMF is, for example, PMFv107.tab.
The “v107” indicates version 1.07. Thirteen BACnet Data Information Packet (BDIP) documents
describe the various portions of the standard PMF. See Table 1.
Custom PMF files and BDIPs can be written for custom MicroTech control applications. Contact
your McQuay representative for a quotation.
Compatibility
The PMF file associates BACnet objects with specific memory locations within the MicroTech
controllers. These memory locations are defined by the MicroTech application software within the
controllers, and thus compatibility between the PMF file and the MicroTech application software
(identified by its IDENT code) must be maintained.
The BACdrop gateway is not able to check for software compatibility. It is the responsibility of the
installer (typically a representative of McQuay International) to assure software compatibility using
the information provided in the BDIP documents. See the appropriate BDIP for more information.
Configuration File
The configuration file contains data that is specific to the network the BACdrop gateway is part of.
The file is created by the BACdrop Setup Wizard during the commissioning process. It includes
information about the number, types, and addresses of the MicroTech controllers. After the
configuration file is created in the BACdrop gateway, it can be uploaded to a PC for backup. If the
SBC or its flash memory chip should ever require replacement, the backup configuration file can be
downloaded (restored) to the BACdrop gateway with the Setup Wizard.
Applying the BACdrop Gateway
The BACdrop gateway is required whenever one or more MicroTech controllers must be integrated
into a BACnet network. Each BACdrop gateway provides a single-point connection for up to 63
MicroTech controllers. See Figures 2 and 3 below.
IM 689-2
9
The following standard MicroTech applications are supported in the current version of the PMF file:
Air-cooled screw chiller (type ALS)
Water-cooled screw chiller (types WHS, PFS-B, PFS-C)
Air-cooled scroll chiller (type AGZ)
Large-tonnage water cooled screw chiller with J&E Hall compressor (type PES)
Series-100 centrifugal chiller (old-style MicroTech controls)
Series-200 centrifugal chiller
Reciprocating chiller (only U.S. manufactured at present)
Self-contained air conditioning systems
Applied rooftop systems
Unit ventilator
MicroTech Lead-Lag/Load Balance Panel (LLLB)—supervisory controller
MicroTech Remote Monitoring and Sequencing Panel (RMS)—supervisory controller
MicroTech Remote Monitoring and Control Panel (RMC)—supervisory controller
MicroTech Chiller System Controller (CSC)—supervisory controller
MicroTech Supervisory Controllers and the Level-2 BACdrop
When a MicroTech supervisory control panel is used (CSC, RMS, RMC, or LLLB), data
transmission speed will be affected. The reason for this is related to the nature of the MicroTech
master-slave network topology.
See figures below. When a MicroTech supervisory controller is not used, the BACdrop gateway is in
the level-1 master position in the MicroTech network. This allows it to obtain data from its level-2
slave controllers in the most efficient way possible. When a MicroTech supervisory controller is used,
it must occupy the level-1 master position, forcing the BACdrop panel to a level-2 slave position.
This means that the level-1 controller (e.g., CSC) must poll the BACdrop for all requests it has of
other controllers (e.g., chiller temperatures) on the network. Because the level-2 BACdrop must wait
to be polled, a delay is introduced that will ultimately affect the responsiveness at the BAS PC. This
delay is minimal—on the order of 1 second per screen of data.
For most applications, a MicroTech supervisory controller is optional. When properly programmed
and installed, a BAS can usually perform the same supervisory control functions that the MicroTech
supervisory controllers perform. One important exception is for the case of a dual-compressor
centrifugal chiller with series-100 (old style) MicroTech controls. For this type of chiller, a
MicroTech supervisory controller—either LLLB or CPC—is required to coordinate compressor
operation.
Figure 2. Typical BACdrop Application (Level-1 BACdrop)
RTU UV
Up to 63 MicroTech
controllers per BACdrop
BACnet on ISO 8802-3 (Ethernet), 10BaseT
MicroTech
BACdrop
(level 1)
Chiller UV UV UVSCU
Level 2
MicroTech
Level 1
BACnet BAS
by others
Main "front end"
PC for BAS
MicroTech network (RS-485)
10
IM 689-2
Figure 3. BACdrop Application with a MicroTech Supervisory Controller (Level-2 BACdrop)
Chiller
Level 2
MicroTech
Up to 63 MicroTech
controllers per BACdrop
BACnet BAS
by others
BACnet on ISO 8802-3 (Ethernet), 10BaseT
MicroTech
BACdrop
(level 2)
Level 1
ChillerChiller
Main "front end"
PC for BAS
CSC
Chiller
MicroTech network (RS-485)
All data requests from BACnet BAS to
MicroTech level-2 controllers are routed
through level-1 MicroTech controller
Monitor Software and BACdrop
In general, MicroTech Monitor™ software should not be used in a BACdrop network—except
perhaps for temporary troubleshooting purposes. A PC containing Monitor software can be directly
connected to port A (TTY) of any MicroTech controller for access to that controller only. (The
BACdrop Setup Wizard is also capable of this, although its capabilities are more limited.) In a
BACnet BAS that is integrated with a MicroTech network via BACdrop, the user interface software
for the main “front end” PC should always be provided by the systems integration company.
When the BACdrop gateway is level 1 (see Figure 2 above), communications between the PC
containing Monitor software and other MicroTech controllers on the network is physically
impossible. Only the MicroTech controller that the PC is directly connected to can be communicated
with. This excludes the BACdrop gateway itself—Monitor software cannot be used to communicate
with the BACdrop gateway by any means. (The BACdrop Setup Wizard allows this.)
When the BACdrop is level 2 (see Figure 3 above), communications between the PC containing
Monitor software and other MicroTech controllers on the network is possible, but it will severely
affect the data transmission rates through the BACdrop gateway. We do not recommend such an
application.
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11
Installation
Panel Location and Mounting
The BACdrop gateway is suitable for indoor use only. Table 2 lists the allowable temperature and
humidity ranges. Locate the panel at a convenient height, and allow adequate clearance for the door
swing. Mount the panel to the wall with screws or bolts. It weighs approximately 10 pounds (4.5 kg).
Four 5/16-inch (7.9 mm) openings are provided at the corners of the panel. Panel dimensions are
shown in Figure 4.
Table 2. BACdrop Gateway Environmental Specifications
Panel state
Temperature
Relative humidity
Operating 32 – 140°F (0 – 60°C) 20 – 90%, noncondensing
In storage 0 – 158°F (-18 – 70°C) 20 – 90%, noncondensing
Figure 4. BACdrop Panel Dimensions
Note:
Values in parentheses
are in millimeters.
Front ViewSide View
Hinge
1.44"
(37)
0.88" (22)
Bottom View
9.44"
(240)
10BaseT Ethernet
port (RJ-45),
external right side
MicroTech network
field terminal block,
external right side
Serial port (DB9),
external right side
10.75"
(273)
6.00"
(152)
11.31"
(287)
11.63"
(295)
1.44"
(37)
0.53" (13)
1.95"
(50)
4.25"
(108)
1.95"
(50)
1.56"
(40)
Top View
4x 0.88 dia. (22)
12
IM 689-2
Field Wiring
Following are descriptions of the various field wiring requirements. A typical field wiring diagram is
shown in Figure 5. Wiring must comply with the National Electrical Code and all local codes and
ordinances. The warranty is void if wiring is not in accordance with these instructions.
The panel is divided into high and low voltage sections by a sheet metal barrier. The power wiring
should enter the high voltage section through one of the 7/8-inch (22 mm) openings. External
receptacles and a terminal block are provided for the low-voltage communications wiring.
Figure 5. Typical Field Wiring Schematic for MicroTech Network
TS2
BACdrop
Hot
Neutral
100 – 240 Vac
Power
L2
L1
GRD
Notes:
1. Twisted, shielded pair cable must meet the following
minimum requirements: 300 V, 60°C, 20 AWG, polyethylene
insulated, with a PVC outer jacket and drain wire (Belden
8762 or equivalent). Some local codes may require the use
of plenum rated cable.
2. 10BaseT Ethernet cable. To directly connect a PC to the
Ethernet port, a hub or a special crossover cable must be
used.
3. Cable length must not exceed 5000 ft (1524 m).
4. Standard serial cable. A null modem is not required.
See notes 1 & 3
Self-contained AC
Port B
GND
TB7
Reciprocating
chiller
Port B
139
TB4
Screw chiller
Port B
55
BLK
WHT
B+
B–
138
137
54
53
Comm B
UVC (325)
1
2
PNK
GRY
Comm B
UVC (125)
4
5
PNK
GRY
RJ-45
3rd-party BAS
See note 2
TB1
Centrifugal chiller
(series 200)
Port B
85
86
84
TB2
Applied rooftop
Port B
130
128
129
Legend
Field wiring terminal
Field wiring: discrete
Factory wiring
Field wiring: twisted, shielded pair cable
with drain wire
(see note 1)
B+
Crimp or solder splice
BLK
WHT
BLK
WHT
BLK
WHT
BLK
WHT
BLK
WHT
BLK
WHT
BLK
WHT
BLK
WHT
BLK
WHT
Comm B
UVC (325)
1
2
PNK
GRY
Comm B
UVC (325)
1
2
PNK
GRY
Comm B
UVC (325)
1
2
PNK
GRY
Ethernet
DB9
PC
PC
+
GRD
Network
See note 4
Field wiring: 10BaseT Ethernet
Standard serial cable
IM 689-2
13
Power
!
WARNING
Electric shock hazard. Can cause personal injury or death.
This equipment must be properly grounded.
All protective deadfront panels must be reinstalled and secured when power wiring is complete.
The BACdrop gateway requires a 100 – 240 Vac, 50/60 Hz power supply. The panel must be properly
grounded by connecting the ground terminal (GRD) to earth ground. Refer to Figure 5. Power wiring
must be sized to carry at least 2 A.
To gain access to the high voltage section, remove the screws that secure the deadfront cover to the
panel. Replace this deadfront when the wiring is complete.
The panel is protected by a 2 A circuit breaker (CB), which is located inside the panel above the
deadfront barrier (see Figure 1). This push-button circuit breaker can be used as an on-off switch for
the panel. A white ring on the switch shaft is visible when the power is off.
MicroTech Network Communications
For MicroTech network communications to occur, a twisted, shielded pair cable must be connected
between the BACdrop gateway and its associated MicroTech unit or supervisory controllers. This
interconnecting, “daisy-chain” wiring is shown in Figure 5. Network communications is
accomplished using the RS-485 interface standard at 9600 baud.
For a typical BACdrop network, the BACdrop gateway is the level-1 controller and the unit
controllers are level-2 controllers. There are no level-3 controllers—except in the case of series-100
(old style) centrifugal chillers, which have a level-2 display processor and a level-3 unit control
processor.
About MicroTech Network Architecture
All controllers in a MicroTech network are assigned a level: level 1, level 2, or level 3. All
networks must have one level-1 controller to coordinate communications. Multiple level-2
controllers connect to the level-1 controller with a communications trunk. A trunk is defined
as an isolated section of the daisy-chained network wiring. In Figure 5, the network wiring
between all controllers is a trunk. Multiple level-3 controllers can be connected to a level-2
controller with a separate trunk; however, this is typically not done in BACdrop
applications. The maximum allowable length of a communications trunk is 5000 ft (1524 m).
Cable Specification
The MicroTech network communications cable must meet the following minimum requirements:
twisted, shielded pair with drain wire, 300 V, 60°C, 20 AWG, polyethylene insulated, with a PVC
outer jacket (Belden 8762 or equivalent). Some local codes or applications may require the use of
plenum rated cable. Do not install the cable in the same conduit with power wiring.
Note:
Ideally, one continuous piece of cable should connect any two controllers. This will reduce the
risk of communications errors. If the cable must be spliced, use crimp-type butt connectors (better) or
solder (best). Do not use wire nuts.
14
IM 689-2
Wiring Instructions
Most MicroTech unit and supervisory controllers are equipped with field terminals for the network
communications terminations. Internal factory wiring connects the field terminals to the MCB’s
network communications port. On a level-2 communications trunk, all MicroTech controllers (either
level 1 or 2) are connected via communications port B. After the field wiring terminations are
complete, a MicroTech controller can be easily disconnected from the network by unplugging its port
B connector. See Figure 5.
On the BACdrop gateway, the field wiring terminals are on the “Network” terminal block. For
MicroTech unit and supervisory controllers, refer to the unit wiring diagrams or product-specific
installation manuals to find the correct field wiring terminals.
Unit designations are established by the network address, not the physical position of the unit in the
daisy chain. Thus the networked controllers can be wired in any order. However, it is highly
recommended that the installing contractor keep track of the physical order of the controllers on the
daisy-chained trunk by preparing a schedule or drawing. This will facilitate troubleshooting any
network communications problems that may occur. For more on the network address, see “About the
Network Address” in the “Network Commissioning” section.
To perform the network wiring
1. Before beginning, verify that the port B plug is disconnected from every MicroTech controller
(MCB) on the communications trunk being wired. These plugs will be connected during the
commissioning procedure. This is a precaution to prevent stray high voltage from damaging the
controllers. Any voltage more than 12 V can damage the board’s communications hardware.
The BACdrop gateway does not have a B port that can be easily disconnected, so do not connect
the network wiring on the BACdrop yet. The final connections will be made during the
commissioning procedure.
2. Connect the network cable in a daisy-chain manner as shown in Figure 5. Do not connect the
BACdrop gateway yet. Observe the following guidelines:
Use care to assure that the correct polarity is maintained at each controller.
Be sure to connect the cable shield to each controller as shown in the illustration. Like the
positive (+) and negative (–) conductors, the shield (ground) conductor must be continuous
over the trunk.
Use care to assure that no shorts or opens exist in the network.
Figure 5 shows the BACdrop gateway at the end of the daisy chain; however, this is not
required. The BACdrop gateway can be located anywhere in the trunk.
Record the physical positions of the cable runs and the controllers on a floor plan. This will
make it easier to troubleshoot any network communications problems that may occur during
installation or in the future.
When making wire splices and multiple-wire terminations, always match wire color to
reduce the risk of shorts.
Note:
Refer to the unit wiring diagrams or product-specific installation manuals to find the
correct field wiring connections.
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15
Network Commissioning
NOTICE
This section discusses the commissioning of a MicroTech network. Only personnel trained in
MicroTech network commissioning procedures are allowed to commission a network. (This
section is for review and guidance.) Network commissioning training classes are held periodically
at McQuay International’s Minneapolis location. Contact the McQuay Controls group for more
information on network commissioning training classes and dates.
Unless special arrangements have been made, commissioning the MicroTech side of a BACdrop
network (i.e., the McQuay equipment including the BACdrop gateway and all MicroTech unit and
supervisory controllers) is the responsibility of the McQuay International sales representative, not
the BAS company.
The purpose of network commissioning is to establish and verify communications between the
BACdrop gateway and its networked MicroTech unit or supervisory controllers. (It is not to establish
and verify unit operation.) Any controller configuration that is necessary to establish network
communications will be discussed in this section. Controller configuration that is required for control
application set up will not be discussed here. That sort of information can be found in the BDIPs and
the MicroTech controller operation manuals.
Network commissioning can be done independently of the unit commissioning procedures; however,
if it is done before the units are commissioned, care should be taken to assure that the units do not
start. Before any unit is allowed to operate, it must be commissioned in accordance with the
instructions in the MicroTech unit controller installation literature and the model-specific unit
installation literature.
Required and Recommended Tools
To commission the network, you need the following tools:
1. Voltmeter
2. Ohmmeter
3. PC (Windows 95/98) equipped with Ethernet card and BACdrop Setup Wizard software (see
note below)
The BACdrop Setup Wizard is included on a set of diskettes that is shipped with the BACdrop
gateway. It is also available on the McQuay OnLine bulletin board system.
4. 10BaseT Ethernet crossover cable (or two standard 10BaseT Ethernet cables and hub) to connect
the PC to the BACdrop’s “Ethernet” port (see note below)
5. Standard serial cable to connect the PC to the BACdrop’s “PC” port (DB9)
These additional tools are recommended:
1. MicroTech PC Communications Cable Kit
A MicroTech PC communications cable may be required to troubleshoot MicroTech controllers
that do not communicate. The cable allows the commissioning PC to be directly connected to a
MicroTech controller. This special cable is available as a kit from McQuay International. The
part number is 057186802.
2. RS-232 to RS-485 converter
An RS-232 to RS-485 converter may be required to troubleshoot MicroTech network
communications problems. The converter allows the commissioning PC to be directly connected
to the MicroTech network, bypassing the BACdrop gateway. The BACdrop Setup Wizard can
then be used to verify communications to each MicroTech controller. An RS-232
to RS-485 converter can be obtained through most electronics supply houses such as B&B
Electronics or Black Box. We recommend B&B model 485PTBR. B&B can be reached at
815-433-5100.
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IM 689-2
3. Set of hand-held radios or other two-way personal communications equipment
For large networks, it is best if two people work together during the network commissioning
process. A set of radios makes this task much easier and more efficient.
Note:
We strongly recommend using a PC that has an Ethernet adapter to commission a BACdrop
network. This allows the technician to prove and demonstrate network communications through the
same port that the third-party BAS will use. We also recognize that many older laptop PCs do not
have a PCMCIA port so that an Ethernet adapter cannot be installed. If your PC is not capable of
Ethernet communications, the MicroTech network can be commissioned using an RS-232 to RS-485
converter instead (see above). The disadvantage of this approach is that communications through the
BACdrop gateway cannot be proved because the gateway is bypassed.
About the Network Address
For MicroTech network communications to occur, each controller in the network must have a unique
network address. The network address has two parts: L2 address and L3 address. Each part is a two-
digit hexadecimal number. For example, a unit at address “01.0F” has an L2 address of 01 and an L3
address of 0F (decimal 15). The first digit in each part is called the HI digit, and the second digit is
called the LO digit. Thus for the L3 address 0F, the HI digit is “0” and the LO digit is “F.” Table 4 is
a hexadecimal to decimal conversion guide.
Figure 6. MicroTech Network Address
01.0F
L2 HI digit
L2 LO digit
L3 HI digit
L3 LO digit
With the exception of the BACdrop gateway (see below), a MicroTech controllers address is
determined by its hex switch setting and its level in the network. Table 3 shows how the network
address is defined. Figure 7 shows the HI and LO hex switches.
Table 3. MicroTech Network Address Definition
When the controller is
The L2 address is
The L3 address is
Level 1 Always 00 Always 00
Level 2 The hex switch setting Always 00
Level 3 Read from its level-2 master at power-up The hex switch setting
Figure 7. MicroTech Controller Hex Switches
1
2
3
0
4
5
6
7
8
9
A
B
C
D
E
F
1
2
3
0
4
5
6
7
8
9
A
B
C
D
E
F
HI (left) hex switch LO (right) hex switch
After changing a hex switch setting, power to the MCB must be cycled to set the new address into
memory. In MicroTech supervisory panels, you can do this by opening and then closing circuit
breaker CB. In the unit controllers, this can be done in a variety of ways. Refer to the individual
installation manuals for more information on cycling power to the unit controller MCBs.
Note:
If any equipment is running, shut it down before removing power from the unit controller.
Follow the shutdown procedures in the unit controller installation and operation manuals.
IM 689-2
17
BACdrop Network Address
Unlike other MicroTech controllers, the BACdrop gateway has no hex switches. Instead, it uses a
software address that can be set with the BACdrop Setup Wizard. In most cases, the BACdrop
gateway will be the level-1 controller and thus its network address will be 00.00, which is the default
setting.
Table 4. Hexadecimal to Decimal Conversion Guide
Hex
Dec
Hex
Dec
Hex
Dec
Hex
Dec
000 1016 2032 3048
011 1117 2133 3149
022 1218 2234 3250
033 1319 2335 3351
044 1420 2436 3452
055 1521 2537 3553
066 1622 2638 3654
077 1723 2739 3755
088 1824 2840 3856
099 1925 2941 3957
0A 10 1A 26 2A 42 3A 58
0B 11 1B 27 2B 43 3B 59
0C 12 1C 28 2C 44 3C 60
0D 13 1D 29 2D 45 3D 61
0E 14 1E 30 2E 46 3E 62
0F 15 1F 31 2F 47 3F 63
Preparing an Address Schedule
It is important that an address schedule be prepared before the network is commissioned. The
schedule will be used to set the MicroTech controller addresses and to configure the BACdrop
gateway. (These tasks are discussed in the commissioning procedures below.) The address schedule
should associate the MicroTech network address, unit type, unit tag and/or location, IDENT, and
Device instance for each MicroTech controller. In addition, each schedule should list the MicroTech
Network Number and the version number of the BACdrop’s point mapping file (PMF).
An example of a possible address schedule is shown in Figure 8. Elements of the schedule are
discussed below. A blank address schedule, which may be photocopied, is included as the last page of
this manual.
Assigning MicroTech Addresses
Since a BACnet BAS does not use the MicroTech network address for communications, the McQuay
representative can assign MicroTech network addresses without consulting with the BAS
representative in advance.
The McQuay representative should keep in mind the following rules when assigning MicroTech
network addresses:
The level-1 controller (usually a BACdrop gateway) always has a network address of 00.00.
If a MicroTech supervisory controller is to be used (RMS, RMC, CSC, or LLLB), it must be the
level-1 controller, forcing the BACdrop gateway to level 2. In most cases, the network address of
a level-2 BACdrop should be 01.00. For a LLLB application, the BACdrop network address
should be 03.00.
The L2 addresses of level-2 MicroTech controllers must start at 01 and continue consecutively
(in hex) up to 3F (decimal 63). If there are more than 63 MicroTech controllers, one or more
additional BACdrop gateways are required.
There must be no gaps in the address sequences and no duplicate settings.
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IM 689-2
For a series-100 centrifugal chiller, the level-2 display processor does not have a BACnet point
map, but it still needs a valid L2 address. The BACnet point map is for the level-3 control
processor, which must always have an L3 address of 01. See example below in Figure 8.
As long as these rules are followed, a MicroTech controllers network address can be set to any value.
Figure 8. Example of an Address Schedule
MicroTech Network No.:
100
PMF Version No.:
1.07
MicroTech
Addr.
Unit
Tag
Unit Type/Description
Compatible
IDENTs
Device
Instance
Location
00.00 BDG-1 BACdrop gateway 10000 Mechanical room
01.00 RTU-1 VAV rooftop ART1E06B–D 10001 Office area
02.00 RTU-2 CAV rooftop ART5E07A–D 10002 Gymnasium
03.00 CH-1 Centrifugal chiller (series-100,
display processor) — No BACnet
point map available
––
03.01 CH-1
Centrifugal chiller (series-100,
control processor)
PC408I 10003 Mechanical room
04.00 10004
05.00 10005
06.00 10006
07.00 10007
08.00 10008
09.00 10009
0A.00 10010
0B.00 10011
About the Device Instance and MicroTech Network Number
The Device object instance and the MicroTech network numbers are BACnet codes used by the BAS
to identify individual MicroTech controllers—the BACnet equivalent of the MicroTech network
address. They must be unique throughout the entire BACnet BAS. The numbers are stored in the
BACdrop gateway’s configuration file.
Since the BAS will be using the Device instance and MicroTech network numbers, it is a good idea to
contact the BAS representative prior to configuring the BACdrop gateway to find out whether they
have any special requirements for these numbers. If they do, their preferred numbers can be recorded
in the schedule. If they do not, the Setup Wizard’s default numbers can be recorded in the schedule
and given to the BAS representative. (As shown in Figure 8, the default MicroTech network number
is 100, and the default Device object instances start at 10000 and continue consecutively to 10063.)
Either way, these numbers must be entered into the BACdrop gateway when it is configured. If the
default numbers are used, data entry will be reduced since the Setup Wizard automatically generates
the numbers.
About the Location
The Location column provides a place to list an optional location label that can later be entered into
the BACdrop gateway during configuration. If this is done, the label will be available to the BAS as
the Location property for each BACnet Device object.
About the PMF Version and Compatible IDENTs
An IDENT is the software ID code for MicroTech controller software. The PMF maps specific
memory locations that are defined in the MicroTech controller software and thus it is essential that
compatibility be maintained between the PMF and IDENT versions. The various BDIP documents
provide this compatibility information.
It is highly recommended that the McQuay representative enter the PMF version and its compatible
IDENTs into the schedule in advance so that the actual controller IDENTs (read out of each
controller’s memory) can be checked against these during the commissioning process. Use the BDIP
IM 689-2
19
documents to fill in the Compatible IDENTs column. For example, document BD 09-7 shows that
rooftop software codes with IDENTs ART1E06B through ART1E06D are compatible with PMF 1.07
(see Figure 8).
It is also recommended that the McQuay representative contact the BAS representative prior to
commissioning the BACdrop network to make sure that BAS engineering personnel will be using
BDIPs for the same PMF version that is on the schedule and which will be used in the BACdrop
gateway.
Projects With Two or More BACdrop Gateways
If a project has two or more BACdrop gateways, the MicroTech networks associated with them
should be separate and independent. The BAS will then have separate connections for each BACdrop
gateway. Each MicroTech network must follow the addressing rules given above in “Assigning
MicroTech Addresses.” Since the Device object instance and MicroTech network numbers must be
unique throughout the BAS, the Setup Wizard’s default values for these can be used on only one
MicroTech network.
Commissioning Overview
Commissioning a MicroTech network that includes a BACdrop gateway is a process that includes
four or five main tasks:
1. Configure the BACdrop gateway
2. Configure the level-1 MicroTech supervisory controller, if present
3. Verify the integrity of the communications trunk
4. Connect the BACdrop gateway to the trunk
5. Connect each MicroTech controller to the trunk and check for communications
Task 1: Configuring the BACdrop Gateway
The first task in commissioning a BACdrop network is to configure the gateway with the BACdrop
Setup Wizard. Configuration essentially involves entering the prepared address schedule into the
SBC’s memory. This allows the BACdrop gateway to properly translate and route data for every
mapped controller on the MicroTech network.
For most applications, all MicroTech controllers should be entered into the BACdrop configuration
file. The level-2 display processor in the series-100 centrifugal chiller is a notable exception. This
MicroTech controller does not have a point map in the PMF since it contains no data or command
points that would be useful to a BAS. Other exceptions may arise; for example, when a customer
does not need BAS access to a particular MicroTech controller.
To configure the BACdrop gateway
1. Connect the PC to the BACdrop gateway with the serial cable.
2. Start the BACdrop Setup Wizard.
For complete reference information on the wizard, including software installation instructions,
see the “BACdrop Setup Wizard User’s Guide” portion of this manual.
3. Select Configure on the BACdrop Panel menu. Then click Modify Controller List on the
submenu.
The Configure Controller List tool starts and its first screen appears. If you are sure that the serial
cable is connected, click the Next button. The second screen appears.
4. Select the COM port you are using and click Next.
The BACdrop Setup Wizard reads the configuration data out of the gateway. The third Configure
Controller List screen appears. By default, the BACdrop gateway is listed as the controller at
address 00.00. The special 00.00 address assignment defines the BACdrop as the level-1 device.
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IM 689-2
If the BACdrop gateway is to be a level-2 device, you should change its address now. Click the
Modify button and enter the new MicroTech address. Click Done when finished. By changing
the BACdrop gateway’s address to a level-2 format (e.g., 01.00), you define the BACdrop as a
level-2 device.
5. Compare the PMF version in the BACdrop gateway with the PMF version listed on your
prepared address schedule. The BACdrop’s PMF version is shown on the main Configure
Controller List screen; e.g., “BACdrop with PMF version 1.07.”
The PMF versions must match to assure software compatibility between the BACdrop gateway
and its MicroTech controllers.
If the BACdrop’s PMF version is earlier than the one listed in the schedule, you should obtain
the later PMF and download it to the BACdrop gateway. You can use the BACdrop Setup Wizard
and a serial cable to do this.
If the BACdrop’s PMF version is later than the one listed in the schedule, you should obtain the
latest versions of the BDIPs for the MicroTech applications being used. Then double check the
software compatibility tables and update the schedule if necessary.
If you have not already done so, you should contact the BAS representative and make sure that
the BAS user interface and supervisory control applications are being designed around the same
or equivalent PMF versions.
6. Click the Add button.
The wizard allows you to define a new MicroTech controller. Enter the MicroTech address, the
Device type, the Device instance, and if desired, the Location. Click Done when finished.
The Device type entries start by listing the first part of the IDENT (the version and revision
codes are not included). This is intended to help you quickly find the correct MicroTech
controller type. It cannot be used to check PMF-IDENT software compatibility.
Any of this configuration data can be modified later by selecting the device and then clicking the
Modify button.
7. Repeat step 6 until the address schedule is completely entered. (But do not add controllers that
will not be mapped; e.g., a series-100 centrifugal chillers level-2 display processor.)
To make data entry easier, the wizard automatically increments the MicroTech address and the
default Device instance number after any controller is added.
8. Click the Finish button when the configuration is complete.
The configuration data is written to the BACdrop gateway’s non-volatile memory. This step is
very important because up until this point, all configuration data that has been entered exists only
in the PC’s memory. If there are a lot of MicroTech controllers, it may be a good idea to
periodically save the configuration data into the BACdrop gateway (i.e., click Finish) during the
process.
Task 2: Configuring a Level-1 MicroTech Supervisory Controller
This task does not apply unless your network has one of the following MicroTech supervisory
controllers:
Chiller System Controller (CSC)
Remote Monitoring and Sequencing Panel (RMS)
Remote Monitoring and Control Panel (RMC)
Lead-Lag/Load Balance Panel (LLLB)
If there is no MicroTech supervisory controller, go on to the next task.
If there is a MicroTech supervisory controller, it needs to be configured so that it polls the level-2
BACdrop. This gives the BAS access to all MicroTech controllers on the network.
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McQuay IM 689-2 Installation & Maintenance Data

Category
Networking
Type
Installation & Maintenance Data

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