Danfoss VLT® HVAC Drive BACnet Operating Instr Operating instructions

Type
Operating instructions

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Contents
1. Introduction
3
Introduction 3
2. Safety
7
Copyright, Limitation of Liability and Revision Rights 7
Safety Precautions 7
3. How to Install
11
The BACnet Option 11
System Specifications 15
4. How to Configure the System
17
Configuring BACnet 17
BIBBs 18
Example of a simple setup of BACnet 19
5. How to Control the Frequency Converter
21
Network Frequency Converter Control Inputs and -Outputs 21
Frequency Converter Feedback to Network 34
6. Parameters
37
Parameter Overview 37
Parameter Description 37
7. Troubleshooting
45
Alarm-, Warning and Extended Status Word 45
Alarm words 46
Warning words 47
Extended status words 48
LED Status 49
Index
50
VLT
®
HVAC Drive BACnet Operating Instruc-
tions
Contents
MG.11.D1.02 - VLT
®
is a registered Danfoss trademark
1
1. Introduction
VLT
®
HVAC Drive BACnet Operating Instruc-
tions
2
MG.11.D1.02 - VLT
®
is a registered Danfoss trademark
1
1. Introduction
1.1. Introduction
1.1.1. About this Manual
First time users can obtain the most essential
information for quick installation and set-up in
these chapters:
Introduction
How to Install
How to Configure the System
Application Example
For more detailed information including the
full range of set-up options and diagnosis
tools please refer to the chapters:
How to Control the FC 100
How to Access FC 100 Parameters
Parameters
Troubleshooting
1.1.2. Technical Overview
BACnet (Building Automation and Control Net-
work) is an open data communications proto-
col, American National Standard (ANSI/ASH-
RAE 135-1995). BACnet provides a means by
which computer-based control equipment
from different manufacturers can work to-
gether. BACnet is designed to handle many
types of building controls, including HVAC,
lighting, security, fire, access control, mainte-
nance and waste management. BACnet per-
mits flexibility for expansion and different
equipment combinations.
Conformance Classes, Function Groups and
the PICS: Evaluating the capabilities of a BAC-
net device is potentially a formidable task,
given the great choice of Objects, Properties
and Services, which can be implemented, as
well as the fact that it is not necessary for ev-
ery BACnet device to have a full BACnet im-
plementation in order to carry out its task.
ASHRAE's BACnet Committee recognized this
problem and responded with aids to evalua-
tion in the form of "Conformance Classes,"
"Function Groups" and the "Protocol Imple-
mentation Conformance Statement" (PICS).
The BACnet protocol defines six levels of Con-
formance Classes, each of which specifies the
minimum subset of Services implemented on
the device. The lowest level, Conformance
Class 1, requires only that the BACnet device
contain a Device Object and that it be able to
execute (respond to) a ReadProperty Service
request. Each successive Conformance Class
level adds Service Requests that must be ex-
ecutable by the device, as well as the Service
Requests it must be able to initiate. Conform-
ance Class 6 requires 21 types of Service Re-
quests (of the 32 overall) to be implemented,
of which 20 must be initi able and 17 execut-
able. Conformance Class thus provides a
measure of the device's ability to communi-
cate.
Function Groups specify a combination of Ob-
jects and Services necessary to carry out cer-
tain building automation functions. They are
specified independently of Conformance
Class, though the implementation of some of
the Function Groups automatically confers
some Conformance Class higher than 1.
VLT
®
HVAC Drive BACnet Operating Instruc-
tions
1. Introduction
MG.11.D1.02 - VLT
®
is a registered Danfoss trademark
3
1
Background information
Protocol name: BACnet
Technology developer: ASHRAE
Year introduced: 1995
Governing standards: ANSI/ASHRAE Standard 135-2004, ISO
16484-5
Openness: Open specification
Physical characteristics
Network topology: Bus
Physical media: Shielded twisted pair
Max. Distance at low speed: 1200 meters
Transport mechanism
Communication methods: Master/slave
Baud Rates Supported: 9600, 19200, 38400, 76800
Termination: 120 ohm
1. Introduction
VLT
®
HVAC Drive BACnet Operating Instruc-
tions
4
MG.11.D1.02 - VLT
®
is a registered Danfoss trademark
1
1.1.3. Assumptions
This manual assumes you are using a Danfoss
BACnet Option Card in conjunction with a
Danfoss FC 100 series frequency converter. It
is also assumed that your master is a BMS or
PC equipped with a serial communication card
supporting all the BACnet communication
services required by your application, and that
all requirements stipulated in the BACnet
standard, as well as those pertaining to the
VLT Variable Speed Drive are strictly observed
as well as all limitations therein fully respec-
ted.
1.1.4. Background Knowledge
The Danfoss BACnet Option Card is designed
to communicate with any master complying
with the BACnet standard. Familiarity with the
PC or PLC used as a master in the system is
assumed. Issues regarding hardware or soft-
ware produced by other manufacturers are
beyond the scope of this manual and are not
the responsibility of Danfoss.
If you have questions regarding set-up of
master-to-master communication or commu-
nication to a non-Danfoss slave, please con-
sult the appropriate manuals.
1.1.5. Available Literature
- Operating Instructions MG.11.Ax.yy provide the neccessary information for getting the
drive up and running.
- Design Guide MG.11.Bx.yy entails all technical information about the drive and customer
design and applications.
- Programming Guide MG.11.Cx.yy provides information on how to programme and in-
cludes complete parameter descriptions.
- Mounting Instruction, Analog I/O Option MCB109, MI.38.Bx.yy
-
VLT
®
6000 HVAC Application Booklet, MN.60.Ix.yy
-
Operating Instructions VLT
®
HVAC Drive BACnet, MG.11.Dx.yy
-
Operating Instructions VLT
®
HVAC Drive Profibus, MG.33.Cx.yy.
-
Operating Instructions VLT
®
HVAC Drive Device Net, MG.33.Dx.yy
-
Operating Instructions VLT
®
HVAC Drive LonWorks, MG.11.Ex.yy
-
Operating Instructions VLT
®
HVAC Drive High Power, MG.11.Fx.yy
-
Operating Instructions VLT
®
HVAC Drive Metasys, MG.11.Gx.yy
x = Revision number
yy = Language code
Danfoss Drives technical literature is also available online at
www.danfoss.com/BusinessAreas/
DrivesSolutions/Documentations/Technical+Documentation.htm
.
VLT
®
HVAC Drive BACnet Operating Instruc-
tions
1. Introduction
MG.11.D1.02 - VLT
®
is a registered Danfoss trademark
5
1
1.1.6. Abbreviations
ACI Acyclical Control Interval PCD Process Data
AOC Application Orientated Controller PCA Parameter Characteristics
BMS Building Management System PCV Parameter-Characteristics-
Value
CAN Controller Area Network PDU Protocol Data Unit
CTW Control Word PLC Programmable Logic Con-
trol
EE-
PROM
Electrical Erasable Programmable Read Only
Memory
PNU Parameter Number
EIA Electronic Industries Association: Specifies of the
EIA Standard RS 485-A
PVA Parameter Value
EMC Electromagnetic Compatibility RC Request/Response Charac-
teristics
FDL Fieldbus Data link Layer STW Status Word
FDT Field Device Tool
IND Sub index
I/O Input/Output
ISO International Standards Organization
LCD Liquid Crystal Display
LCP Local Control Panel
LED Light Emitting Diode
MAV Main Actual Value
MOC Motion Orientated Controller
MRV Main Reference Value
PC Personal Computer
1. Introduction
VLT
®
HVAC Drive BACnet Operating Instruc-
tions
6
MG.11.D1.02 - VLT
®
is a registered Danfoss trademark
1
2. Safety
2.1. Safety
2.1.1. Copyright, Limitation of Liability and Revision Rights
This publication contains information proprietary to Danfoss A/S. By accepting and using this
manual the user agrees that the information contained herein will be used solely for operating
equipment from Danfoss A/S or equipment from other vendors provided that such equipment is
intended for communication with Danfoss equipment over a serial communication link. This pub-
lication is protected under the Copyright laws of Denmark and most other countries.
Danfoss A/S does not warrant that a software program produced according to the guidelines pro-
vided in this manual will function properly in every physical, hardware or software environment.
Although Danfoss A/S has tested and reviewed the documentation within this manual, Danfoss A/
S makes no warranty or representation, neither expressed nor implied, with respect to this doc-
umentation, including its quality, performance, or fitness for a particular purpose.
In no event shall Danfoss A/S be liable for direct, indirect, special, incidental, or consequential
damages arising out of the use, or the inability to use information contained in this manual, even
if advised of the possibility of such damages. In particular, Danfoss A/S is not responsible for any
costs, including but not limited to those incurred as a result of lost profits or revenue, loss or
damage of equipment, loss of computer programs, loss of data, the costs to substitute these, or
any claims by third parties.
Danfoss A/S reserves the right to revise this publication at any time and to make changes to its
contents without prior notice or any obligation to notify former or present users of such revisions
or changes.
2.1.2. Safety Precautions
The voltage of the frequency converter is dangerous whenever connected to mains.
Incorrect installation of the motor, frequency converter or fieldbus may cause dam-
age to the equipment, serious personal injury or death. Consequently, the instruc-
tions in this manual, as well as national and local rules and safety regulations, must
be complied with.
Safety Regulations
1. The mains supply to the frequency converter must be disconnected whenever repair work
is to be carried out. Check that the mains supply has been disconnected and that the
necessary time has elapsed before removing motor and mains supply plugs.
2. The [OFF] button on the control panel of the frequency converter does not disconnect
the mains supply and consequently it must not be used as a safety switch.
3. The equipment must be properly earthed, the user must be protected against supply
voltage and the motor must be protected against overload in accordance with applicable
national and local regulations.
4. The earth leakage current exceeds 3.5 mA.
VLT
®
HVAC Drive BACnet Operating Instruc-
tions
2. Safety
MG.11.D1.02 - VLT
®
is a registered Danfoss trademark
7
2
5. Protection against motor overload is not included in the factory setting. If this function
is desired, set par.
1-90 Motor Thermal Protection
to data value ETR trip 1 [4] or data
value ETR warning 1 [3].
6. Do not remove the plugs for the motor and mains supply while the frequency converter
is connected to mains. Check that the mains supply has been disconnected and that the
necessary time has elapsed before removing motor and mains plugs.
7. Please note that the frequency converter has more voltage sources than L1, L2 and L3,
when load sharing (linking of DC intermediate circuit) or external 24 V DC are installed.
Check that all voltage sources have been disconnected and that the necessary time has
elapsed before commencing repair work.
Warning against unintended start
1. The motor can be brought to a stop by means of digital commands, bus commands,
references or a local stop, while the frequency converter is connected to mains. If per-
sonal safety considerations (e.g. risk of personal injury caused by contact with moving
machine parts following an unintentional start) make it necessary to ensure that no un-
intended start occurs, these stop functions are not sufficient. In such cases the mains
supply must be disconnected or the
Safe Stop
function must be activated.
2. The motor may start while setting the parameters. If this means that personal safety
may be compromised (e.g. personal injury caused by contact with moving machine
parts), motor starting must be prevented, for instance by use of the
Safe Stop
function
or secure disconnection of the motor connection.
3. A motor that has been stopped with the mains supply connected, may start if faults occur
in the electronics of the frequency converter, through temporary overload or if a fault in
the power supply grid or motor connection is remedied. If unintended start must be
prevented for personal safety reasons (e.g. risk of injury caused by contact with moving
machine parts), the normal stop functions of the frequency converter are not sufficient.
In such cases the mains supply must be disconnected or the
Safe Stop
function must be
activated.
NB!
When using the
Safe Stop
function, always follow the instructions in the
Safe Stop
section.
4. Control signals from, or internally within, the frequency converter may in rare cases be
activated in error, be delayed or fail to occur entirely. When used in situations where
safety is critical, e.g. when controlling the electromagnetic brake function of a hoist ap-
plication, these control signals must not be relied on exclusively.
Touching the electrical parts may be fatal - even after the equipment has been dis-
connected from mains.
Also make sure that other voltage inputs have been disconnected, such as external 24 V DC, load
sharing (linkage of DC intermediate circuit), as well as the motor connection for kinetic back up.
Protection Mode
Once a hardware limit on motor current or dc-link voltage is exceeded the drive will enter “Pro-
tection mode”. “Protection mode” means a change of the PWM modulation strategy and a low
switching frequency to minimize losses. This continues 10 sec after the last fault and increases
the reliability and the robustness of the drive while re-establishing full control of the motor.
In hoist applications “Protection mode” is not usable because the drive will usually not be able to
leave this mode again and therefore it will extend the time before activating the brake – which is
not recommendable.
2. Safety
VLT
®
HVAC Drive BACnet Operating Instruc-
tions
8
MG.11.D1.02 - VLT
®
is a registered Danfoss trademark
2
The “Protection mode” can be disabled by setting parameter 14-26 “Trip Delay at Inverter Fault”
to zero which means that the drive will trip immediately if one of the hardware limits is exceeded.
VLT
®
HVAC Drive BACnet Operating Instruc-
tions
2. Safety
MG.11.D1.02 - VLT
®
is a registered Danfoss trademark
9
2
3. How to Install
VLT
®
HVAC Drive BACnet Operating Instruc-
tions
10
MG.11.D1.02 - VLT
®
is a registered Danfoss trademark
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3. How to Install
3.1. The BACnet Option
3.1.1. Installation of the Option
Items required to install a fieldbus option in the frequency converter:
- - The fieldbus option
- - Fieldbus option adaptor frame for the frequency converter. This frame is deeper than
the standard frame, to allow space for the fieldbus option beneath.
- - Cable holders
VLT
®
HVAC Drive BACnet Operating Instruc-
tions
3. How to Install
MG.11.D1.02 - VLT
®
is a registered Danfoss trademark
11
3
Instructions:
- - Remove the LCD panel from the frequency converter.
- - Remove the frame located beneath and discard.
- - Push the option into place. Two positions are possible, with cable terminal facing either
up or down. The cable up position is often most suitable when several frequency con-
verters are installed side by side in a rack, as this position permits shorter cable lengths.
- - Push the fieldbus option adaptor frame for the frequency converter into place.
- - Remove the Plug for the FC Port and connect the Plug that is connected to the BACnet
Option
- - Replace the LCD panel.
- - Attach cable.
- - Fasten the cable in place using cable holders. The frequency converter top surface has
pre-drilled threaded holes for attaching the cable holders to the unit.
3.1.2. Cabling
Cable lengths and number of nodes
The maximum cable length allowable in one segment is dependent on the transmission speed.
The total cable length includes drop cables if any. A drop cable is the connection from the main
bus cable to each node if a T-connection is used instead of permissible cable length and maximum
number of nodes/Drivess with 1, 2, 3 and 4 bus segments.
3. How to Install
VLT
®
HVAC Drive BACnet Operating Instruc-
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12
MG.11.D1.02 - VLT
®
is a registered Danfoss trademark
3
Drop cable connection (i.e. T-connection) beyond the cable lengths indicated is not recommended,
due to the increased risk of reflection occurring. Instead, Danfoss recommends direct connection
of the frequency converter.
Note that a repeater is a node in both of the two segments it connects. The number of frequency
converters is based on a single master system. If there are two or more masters (e.g. PC tools,
Routers), the number of frequency converters must be reduced correspondingly.
Network topology Maximum cable length
Free topology without repeater 500 m
Free topology with one repeater 1000 m
Free topology maximum device-to-device 500 m
Bus topology single terminated 500 m
Bus topology double terminated without repeater 2700 m
Bus topology double terminated with one repeater 5400 m
Bus topology maximum stub length 3 m
The length statements in the tables above are valid for bus cable with the following properties:
- Impedance: 135 to 165 Ohm at a measuring frequency from 3 to 20 MHz
- Resistance: <110 Ohm/km
- Capacitance: <30 pF/m
- Damping: max. 9 dB over the whole wire length
-
Cross section: max. 0.34 mm
2
, corresponding to AWG 22
- Cable type: twisted in pairs, 1 x 2, or 2 x 2, or 1 x 4 wires
- Screening: Copper-braided screen or braided screen and foil screen
Use of the same cable type throughout the entire segment is recommended to avoid impedance
mismatch.
3.1.3. Network Termination
Connecting the Bus Line
Connect the BACnet Option Card to the bus
line via terminals 62, 63 and 66. Terminal 62
is Marked Red and Terminal 62 is marked
Green. These two are the RS485 lines. Termi-
nal 66 the signal Ground for the RS485 Trans-
mitter. In large systems it is recommended to
use
VLT
®
HVAC Drive BACnet Operating Instruc-
tions
3. How to Install
MG.11.D1.02 - VLT
®
is a registered Danfoss trademark
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3
Maximum Cable Lengths
Maximum total bus cable length: 4000Feet ~ 1200Meter
3.1.4. Cable Routing
The BACnet communication cable must be
kept away from motor and brake resistor ca-
bles to avoid coupling of high frequency noise
from one cable to the other. Normally a dis-
tance of 200 mm is sufficient, but maintaining
the greatest possible distance between cables
is generally recommended, especially where
cables run in parallel over long distances.
When crossing is unavoidable, the BACnet ca-
ble must cross motor and brake resistor cables
at an angle of 90 degrees.
3. How to Install
VLT
®
HVAC Drive BACnet Operating Instruc-
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14
MG.11.D1.02 - VLT
®
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3
3.2. System Specifications
3.2.1. EMC Precautions
The following EMC precautions are recom-
mended to achieve interference-free opera-
tion of the BACnet network. Additional EMC
information is available in the
VLT
®
HVAC
Drive Design Guide, MG.11.Bx.yy
. Please also
consult the BACnet master manual for further
installation guidelines.
NB!
Ensure compliance with relevant national and local regulations, for example in pro-
tective earth connection.
3.2.2. Connection of the Cable Screen
It is recommended to connect the screen to
ground in both end of the Bus Cable. This en-
sures the optimum resistance towards EMC
noise. screen of the BACnet cable must always
be connected to ground at both ends, mean-
ing the screen must be connected to ground
in all stations connected to the BACnet net-
work. It is very important to have a low im-
pedance ground connection of the screen,
also at high frequencies. This can be obtained
by connecting the surface of the screen to
ground, for example by means of a cable
clamp or a conductive cable gland. The FC 100
Series has various clamps and brackets to en-
able a proper ground connection of the BAC-
net cable screen.
3.2.3. Earth Connection
It is important that all stations connected to
the BACnet network are connected to the
same earth potential. The earth connection
must have low HF (high frequency) impe-
dance. This can be achieved by connecting a
large surface area of the cabinet to earth, for
example by mounting the FC 100 series on a
conductive rear plate. Particularly when there
are long distances between the stations in a
BACnet network, it can be necessary to use
additional potential equalizing cables, con-
necting the individual stations to the same
earth potential. The use of Repeaters with
galvanic isolation or Fibre optic can improve
VLT
®
HVAC Drive BACnet Operating Instruc-
tions
3. How to Install
MG.11.D1.02 - VLT
®
is a registered Danfoss trademark
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3
the EMC performance and reduce Ground loop
Current.
3. How to Install
VLT
®
HVAC Drive BACnet Operating Instruc-
tions
16
MG.11.D1.02 - VLT
®
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3
4. How to Configure the System
4.1. Configuring BACnet
4.1.1. Initialization Procedure
The Initialization Procedure is explained by the flow chart given below:
Initialization Parameter
General Settings
Name
Parameter
Number
Default Value Setting for BACnet
Control Site 8-01
Digital and control
word
Digital and control word
Control word source 8-02 FC RS-485 FC RS-485
ControlWord Timeout
time
8-03 1.0 sec 1.0 sec
ControlWord Timeout
Function
8-04 Off Off
End of Timeout Function 8-05 Resume setup Resume setup
Reset ControlWord Time-
out
8-06 Do not reset Do not reset
Diagnosis 8-07 Set up Don’t care
ControlWord Profile 8-10 FC Profile FC Profile
FC Port Settings
Name
Parameter
Number
Default Value Setting for BACnet
Protocol 8-30 FC FC Option
Address 8-31 1 1
Baud Rate 8-32 9600 baud 9600 baud
Minimum Response Delay 8-35 10 ms 10 ms
Max Response Delay 8-36 5000 ms 5000 ms
Table 4.1: 1) Please see also section: Parameter Overview >Parameter List.
VLT
®
HVAC Drive BACnet Operating Instruc-
tions
4. How to Configure the System
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4
Digital/Bus settings
Name
Parameter
Number
Default Value Setting for BACnet
Coasting Select 8-50 Logic-or Logic-or
Quick Stop Select 8-51 Logic-or Logic-or
DC Brake Select 8-52 Logic-or Logic-or
Start Select 8-53 Logic-or Logic-or
Reversing Select 8-54 Logic-or Logic-or
Set-up Select 8-55 Logic-or Logic-or
Preset reference Select 8-56 Logic-or Logic-or
BACnet settings
Name
Parameter
Number
Default Value Setting for BACnet
BACnet device Instance 8-71 1 1
MS/TP Max Masters 8-73 127
Depent on the Number
of Masters in the system
I am transmit time 8-74 At power up At power up
Initialisation Password 8-75 “admin” “admin”
4.1.2. Control Word Time-out Function
Par. 8-03 Control Word Timeout Time
and
par. 8-04 Control Word Timeout Function
are not en-
abled in this version of the BACnet option.
4.2. BIBBs
4.2.1. Bibb's
ReadProperty Service
ReadPropertyMultiple Service
WriteProperty Service
WritePropertyMultiple Service
ConfirmedEventNotification Service
UnconfirmedEventNotification Service
GetEventInformation Service
AcknowledgeAlarm Service
ReinitializeDevice Service
DeviceCommunicationControl Service
I-Have Service
Who-Has Service
Who-Is Service
I-am Service
4. How to Configure the System
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®
HVAC Drive BACnet Operating Instruc-
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TimeSynchronization
4.3. Example of a simple setup of BACnet
This example shows the necessary steps to set up the FC102 BACnet interface with the following
system requirements:
• MS/TP running at 38.400 Baud
• MAC address 20 for the FC102
• BACnet Device Instance 0 1025
• Highest number of a Master stack is 35
• Start/stop of FC from BACnet only
• Reference from BACnet
• Read status of FC (Actual speed)
Set the following parameters:
Name Parameter number Value
Protocol 8-30 FC option [9]
Address 8-31 20
FC Port Baud Rate 8-32 38,400 Baud [4]
Coasting Select 8-50 Bus [1]
BACnet device Instance 8-70 1025
MS/TP Max Masters 8-72 35
After the parameters have been set according the table above, the drive has to be unpowered
and repowered before the changes take effect. When the frequency converter is detected by the
BMS, the drive can be controlled by BV:1, which will start the motor if set to [1]. Setting AV:0 will
set the speed reference of the drive. The actual speed can be monitored via AV:1. See also
Analog
Input- and Output Objects
section.
VLT
®
HVAC Drive BACnet Operating Instruc-
tions
4. How to Configure the System
MG.11.D1.02 - VLT
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4
5. How to Control the Frequency Converter
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