Contents
■
VLT®2800 / FCD 300 DeviceNet
Introd
Technical Data
uction
About this manual .................................................................................................. 3
Assumptions .......................................................................................................... 3
What yo
Available literature .................................................................................................. 4
Supplied with the unit ............................................................................................ 4
Produc
Network ................................................................................................................. 5
User Profile ............................................................................................................ 5
Interfa
Data Communication Interface ............................................................................... 5
Overall Function ..................................................................................................... 5
Control
Cable Le
Topology ................................................................................................................ 6
Cable Specifications ............................................................................................... 6
Network
Cable Cross Section .............................................................................................. 6
EMC Precautions ................................................................................................... 7
VLT Respo
u should already know .............................................................................. 3
t and Environment ...................................................................................... 5
ce to DeviceNet Network ............................................................................. 5
Card Self-test ............................................................................................ 5
ngths ........................................................................................................ 6
Power Supply ......................................................................................... 6
....................................................................................................... 3
.................................................................................................. 6
nse Time ............................................................................................... 8
Electrical Installation
VLT 2800 C
VLT 2800 Earth Connection ................................................................................... 10
VLT 2800 DeviceNet Connection ........................................................................... 10
FCD 300 El
User Interface ......................................................................................................... 12
Quick Setup ........................................................................................................... 13
onnection of the Cable Screen ........................................................... 9
ectrical connection ............................................................................... 11
Master-Slave configuration
Drive Pro
I/O Assembly Instances ......................................................................................... 15
Control Word and Status Word under
Instance
Control Word and Status Word
under Instance 21/71 ............................................................................................. 17
Bus speed r
Actual output speed, under Instance 20/70
and 21/71 ............................................................................................................. 19
Control Wo
Bus reference value ............................................................................................... 23
Actual output frequency ......................................................................................... 23
Process Da
file
....................................................................................................... 15
20/70 ....................................................................................................... 16
eference value, under Instance 20/70 and 21/71 ............................... 19
rd and Status Word under Instance 100/150 and 101/151 ................. 20
ta, PCD ................................................................................................ 24
.................................................................................... 9
....................................................................... 14
DeviceNet object classes
Class Code
MG.90.B2.02 - VLT is a registered Danfoss trade mark
0x01 ................................................................................................... 25
........................................................................... 25
1
VLT®2800 / FCD 300 DeviceNet
Class Code 0x02 ................................................................................................... 25
Class Code 0x03 ................................................................................................... 25
Class C
Class Code 0x05 ................................................................................................... 26
Class Code 0x28 ................................................................................................... 30
Class Co
Class Code 0x2A ................................................................................................... 32
Danfoss Classes .................................................................................................... 33
ode 0x04 ................................................................................................... 26
de 0x29 ................................................................................................... 31
DeviceNet Operation Mode
Bit Strobe ............................................................................................................... 34
Polling
Change of State, COS ........................................................................................... 35
EDS File
VLT 2800 US version with DeviceNet .................................................................... 36
VLT 2800 European version with DeviceNet .......................................................... 36
FCD 300 E
Programming
Special
Warning and Alarm Messages ............................................................................... 45
Abbreviations ......................................................................................................... 46
Factory s
Factory settings - FCD 300 .................................................................................... 55
Addition
.................................................................................................................... 35
s
............................................................................................................. 36
uropean version with DeviceNet ........................................................... 37
.................................................................................................... 38
Attention .................................................................................................... 38
ettings - VLT 2800 .................................................................................. 47
al control features for VLT 2800
........................................................................ 34
............................................ 62
2
MG.90.B2.02-VLTisaregisteredDanfosstrademark
Introduction
■
About this manual
■
This manual is intended to be used both as an
instructional and as a reference manual. It only
briefly touches on the basics of the DeviceNet
protocol. Whenever it is necessary for gaining
an understanding of the AC Drive Profile, please
refer to the ODVA version 2.0.
The manual is also intended to serve as a
guideline when you specify and optimize your
communication system.
Even if you are an experienced DeviceNet programmer,
we suggest that you read this manual in its entirety
before you start programming, since important
information can be found in all chapters.
Assumptions
■
This manual assumes that you are using a DANFOSS
VLT 2800 or FCD 300 unit with DeviceNet. It is
also assumed that you are using a PLC or PC, as a
master, that is equipped with a serial communication
card supporting all the DeviceNet communication
services required by your application. Further more
it is assumed that all requirements stipulated in the
DeviceNet standard as well as those set up in the
AC Drive Profile and those pertaining to the VLT
Variable Speed Drive are strictly observed as well
as all limitations therein fully respected.
VLT®2800 / FCD 300 DeviceNet
Introduction
What you should already know
■
The DANFOSS DeviceNet is designed to communicate
with any master abiding by the DeviceNet standard.
It is therefore assumed that you have full knowledge
of the PC or PLC you intend to use as a master
in your system. Any questions pertaining to
hardware or software produced by any other
manufacturer is beyond the scope of this manual
and is of no concern to DANFOSS.
If you have questions about how to set up master
- master communication or communication to
a non-Danfoss slave, the appropriate manuals
should be consulted.
MG.90.B2.02 - VLT is a registered Danfoss trade mark
3
VLT®2800 / FCD 300 DeviceNet
Available literature
■
Supplied with the unit
■
Below is a list of the literature available for VLT 2800
and FCD 300. It must be noted that there may be
deviations from one country to the next.
Supplied with the unit:
Operating instructions ....................................................................................................................... MG.28.AX.YY
Quick setup ....................................................................................................................................... MG.28.AX.62
Parameter list ................................................................................................................................... MG.28.DX.YY
Various literature:
Design Guide for VLT 2800 .............................................................................................................. MG.28.EX.YY
Data sheet for VLT 2800 .................................................................................................................. MD.28.AX.YY
Design Guide for FCD 300 ............................................................................................................... MG.04.AX.YY
Data sheet for FCD 300 ................................................................................................................... MD.04.AX.YY
Instructions for VLT 2800:
Assembly/disassembly ....................................................................................................................... MI.28.A1.02
LCP remote-mounting kit ................................................................................................................... MI.56.AX.51
Filter instruction .................................................................................................................................. MI.28.B1.02
Communication with VLT 2800 and FCD 300:
Profibus manual ................................................................................................................................ MG.90.AX.YY
VLT 2800 DeviceNet manual ............................................................................................................ MG.90.BX.YY
X = version number
YY = language version
4
MG.90.B2.02-VLTisaregisteredDanfosstrademark
Product and Environment
■
DeviceNet is a distributed control network. The
Net protocol is embedded in the control card
Device
and is a communication protocol conforming to the
Open DeviceNet Vendor Association (ODVA) standard.
The control card allows DeviceNet compatible
controllers, sensors, and network management
tools to control, monitor, and supervise the
VLT frequency converter. The control card is
designed to the DeviceNet System Protocol for
Vendors as a slave device.
Network
■
The VLT frequency converter will function as a slave
on the DeviceNet network. All addressing and linking
to nodes is done at installation time by a network
manager tool. The network installer and the network
management master have a significant influence on
how the node functions on the network. A DeviceNet
network can support up to 64 nodes.
User Profile
■
The end-user is a network manager programmer
or a controller who see the DeviceNet control
card as a transparent bridge to the VLT frequency
converter. Control and supervision of the VLT
frequency converter will still be possible through
the standard parameter set.
VLT®2800 / FCD 300 DeviceNet
LCP2 or Dialog can be used on the Sub D
plug while using DeviceNet.
Overall Function
■
DeviceNet is a low-level network that standardizes
communications between industrial devices (sensors,
limit switches) and high level devices (controllers).
The communication network can be peer to peer or
master/slave. DeviceNet uses CAN technology for
Media Access Control and Physical Signaling and it
supports up to 64 nodes. DeviceNet also defines
device profiles for devices belonging to specific
classes. For other devices, a custom class must be
defined in order to make it DeviceNet compatible.
This further enhances the interchangeability and
interoperability of the network. Each node on the
network has its own unique media access control
identifier (MAC ID) to distinguish it on the network.
Control Card Self-test
■
Please refer to parameter 620 in the
Programming chapter.
Introduction
Interface to DeviceNet Network
■
The Interface connection to the DeviceNet network is
implemented through a CAN chip. Four different I/O
Assembly is available in the VLT frequency converter
DeviceNet interface, which can be configured by
the user. The I/O assembly can handle Polled
mode, Bit Strobe, Change of state (COS) and
Cyclic. For explicit messages, the interface has two
Unconnected Messages Manager (UCMM) available.
This allows two nodes on the DeviceNet to directly
access parameters in the VLT frequency converter
without involving a pre-configured master.
Data Communication Interface
■
No direct data communication interface (e.g. via a
serial port) other than the DeviceNet interface and the
VLT frequency converter interface is considered.
MG.90.B2.02 - VLT is a registered Danfoss trade mark
5
Technical Data
■
Cable Lengths
■
125k baud 500 meters (1640 ft.) 156meters(512ft.)
250k baud 250 meters (820 ft.) 78 meters (256 ft.)
500k baud 100 meters (328 ft.)
Topology
■
VLT®2800 / FCD 300 DeviceNet
Drop LengthBaud Rate Max. total cable length [m]
Maximum Cumulative
6 meters (20 ft.)
for one drop
39 meters (128 ft.)
Cable Specifications
■
The cable is to be used according to ODVA
specifications.
Network Power Supply
■
The DeviceNet option is an optically isolated node,
where transceiver power is provided by the network.
External network power supply requirements are:
11 - 25 VDC
10 mA draw per VLT frequency converter node.
Cable Cross Section
■
6
MG.90.B2.02-VLTisaregisteredDanfosstrademark
VLT®2800 / FCD 300 DeviceNet
EMC Precautions
■
The following EMC precautions are recommended to
interference free operation of the DeviceNet
obtain
network. Additional information on EMC can be
found in the FCD 300 and in the VLT 2800 Series
ting Instructions and Design Guide.
Opera
NB!:
Relevant national and local regulations,
for example regarding protective earth
connection, must be observed
The De
kept away from motor and brake resistor cables
viceNet communication cable must be
to avoid coupling of high frequency noise from
one cable to the other. Normally a distance of
200 mm (
recommended to keep the greatest possible distance
between the cables, especially where cables are
runni
If the DeviceNet cable has to cross a motor
and brake resistor cable they must cross each
other at an angle of 90
8 inches) is sufficient, but it is generally
ng in parallel over long distances.
.
Technical Data
Example: VLT 2800 panel mounting
MG.90.B2.02 - VLT is a registered Danfoss trade mark
7
VLT Response Time
■
The update time via the DeviceNet connection
can be d
1. The communication time, which is the time it
2. The internal update time, which is the time it
ivided into two parts:
takes to transmit data from the master to the
slave (VLT with DeviceNet option).
takes to transmit data between the VLT frequency
converter control card and the DeviceNet interface.
VLT®2800 / FCD 300 DeviceNet
Communication time (t
mission speed (baudrate) and the type of master
trans
in use. More slaves or lower transmission speed
will increase the communication time.
) depends on the actual
com
Data Update
time, t
int
Control word via I/O instances 14 msec
Main actual value via I/O instances 44 msec
Status word via I/O instances 14 msec
Reference via I/O instances 44 msec
Control via Class Code 0x29 14 msec
ReferenceviaClassCode0x2A 44msec
Change of parameter via Explicit
94 msec
message and Danfoss Object
Read of parameter via Explicit message
14 msec
and Danfoss Object
8
MG.90.B2.02-VLTisaregisteredDanfosstrademark
Electrical Installation
■
VLT®2800 / FCD 300 DeviceNet
VLT 2800 Connection of the Cable Screen
■
Danfoss recommends that the screen of the DeviceNet
cable be connected to ground at both ends of
the cable at every DeviceNet station (see Danfoss
recommendation for further details).
It is very important to have a low impedance 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. VLT
frequency converter Series are provided with different
clamps and brackets to enable a proper ground
connection of the DeviceNet cable screen. The
screen connection is shown in the drawing.
For fulfilling the CE and EMC compliance.
VLT 2800 ODVA recommendation
Screen must be connected to ground at only
one point on the network.
NB!:
Please note, that this recommendation conflicts
with the EMC correct installation.
Electrical Installation
MG.90.B2.02 - VLT is a registered Danfoss trade mark
9
VLT 2800 Earth Connection
■
portant that all stations connected to the
It is im
DeviceNet network are connected to the same earth
potential. The earth connection must have a low HF
requency) impedance. This can be achieved
(high f
by connecting a large surface area of the cabinet to
ground, for example by mounting the VLT frequency
rter on a conductive rear plate. Especially
conve
when having long distances between the stations
in a DeviceNet network it can be necessary to use
ional potential equalizing cables, connecting the
addit
individual stations to the same earth potential.
VLT 2800 DeviceNet Connection
■
It is essential that the bus line be terminated properly.
match of impedance may result in reflections
Amis
on the line that will corrupt data transmission.
VLT®2800 / FCD 300 DeviceNet
The DeviceNet control card is provided with
a pluggable connector.
By using a pluggable connector as a splice between
trunk lines, removal of devices will not sever the
two
network. Strain relief, if required, must be provided by
the developer. In current installations of this type of
nector, the strain relief is attached to the product.
con
NB!:
Wires should not be installed while the
network is active. This will prevent problems
such as shorting the network supply or
disrupting communications.
VLT 2800 Drop cable
An alternative to splicing two trunk lines in the
nnector on the control card, is using a DeviceNet
co
connection box or a T-connector. For this kind of
installation a drop cable is available as an option.
Drop cable ordering number: 195N3113
NB!:
Please note, that terminal 46 has been removed
from the DeviceNet card, meaning that
parameter 341-342 are not having any function.
10
MG.90.B2.02-VLTisaregisteredDanfosstrademark
FCD 300 Electrical connection
■
The DeviceNet bus connection can be performed
h a plug, that is to be mounted in the
throug
FCD 300 housing (M16 gland hole) and wired
to the inside terminal strip.
Wiring list
VLT®2800 / FCD 300 DeviceNet
M12 Circular connector
Terminal strip Colour Function
4 68 White Can high
5 69 Blue Can low
2 67 Red +24V
3 70 Black GND
1 D Green Drain
DeviceNet plug 175N2279
Electrical Installation
MG.90.B2.02 - VLT is a registered Danfoss trade mark
11
User Interface
■
The DeviceNet control card contains two
or (green/red) LED’s for each connector
bi-col
hookup port, to indicate the state of the device
and network, respectively.
Module LED:
VLT®2800 / FCD 300 DeviceNet
LD1 on VLT 2800 Dual colour
(Green/Red)
Yellow FCD 300 STATUS LED
when selected as DeviceNet in
VLT status
parameter 26
OFF OFF Device is OFF
GREEN YELLOW Device is operational
Flashing GREEN Flashing YELLOW Device is in standby
Flashing RED OFF Device detects a recoverable fault
RED OFF Device detects an unrecoverable
fault
Flashing GREEN/RED Flashing YELLOW Device is self testing
WORK LED:
NET
VLT status LD2 on VLT 2800 Dual
lour (Green/Red)
co
Network is non-
OFF OFF Network is non-
powered/not on-line
twork is on-line but
Ne
ashing GREEN
Fl
not connected
Network is on-line and
nnected
co
Network has a
GREEN GREEN Network is on-line and
Flashing RED OFF Network has a
connection timeout
etwork has a critical
N
ED
R
link failure
Green BUS LED on
D 300
FC
ashing GREEN
Fl
FF
O
VLT status
powered/not on-line
twork is on-line but
Ne
not connected
nnected
co
connection timeout
etwork has a critical
N
link failure
12
MG.90.B2.02-VLTisaregisteredDanfosstrademark
Quick Setup
■
Parameter 800 = "Fieldbus selection".
Parameter 833 = "Fieldbus enable".
Parameter 918 = "Select Bus address".
Parameter 801 = "Select Baudrate".
Parameter 904 = "Choose I/O instances".
Parameter 502 = "Coasting select".
VLT®2800 / FCD 300 DeviceNet
Electrical Installation
MG.90.B2.02 - VLT is a registered Danfoss trade mark
13
Master-Slave configuration
■
System configuration
■
The system configuration of a DeviceNet master and a
VLT 2800/FCD 300 can be split up into two parts.
The first part is the setting of DeviceNet communication
related parameters. These are the baud rate and
station address/MAC ID.
By VLT 2800/FCD 300 these parameters can
be set by the LCP or access via a DeviceNet
configuration tool. None of these parameters
can be set by mechanical switches.
After the baud rate and station address/MAC ID
are set a connection to a DeviceNet DeviceNet
configuration tool can be established.
The second and larger area of a system configuration
is the setting of application related parameters.
EDS files are easy to create and it is strongly
recommended to generate an EDS for each VLT
2800/FCD 300. This can be done by uploading the
EDS file from each drive by a DeviceNet configuration
tool. In the VLT 2800/FCD 300 EDS file it is possible to
configured the drive and read or write to parameters.
The language of the EDS file is depending of the
actual setting of parameter 001 Language.
In parameter 838 EDS Data type it is possible to
choose between two dataformat for uploading EDS
files. Before uploading the EDS file please check if
the master support Errata 1 or Errata 2.
For Off-line configuration Danfoss can provide
you with english EDS files, see section EDS
files for the EDS file name. Contact your local
Danfoss supplier for the EDS files.
VLT®2800 / FCD 300 DeviceNet
Another important configuration parameter is the
selection of communication mechanisms that enable
an efficient and responsive I/O system. By VLT
2800/FCD 300 it is possible to choose between the
following communication mechanisms:
•
Poll I/O
•
Bit Strobe I/O
•
Change-of-state (COS) / Cyclic I/O
•
Explicit Messaging
See DeviceNet Operation Mode in this manual
for further information.
The last configuration parameter is the choice of
Instance type in parameter 904 PPO selection. Here is
it possible to select beween a Danfoss Specific profile
(Instance 100/150 or 101/151) or a ODVA Specific
AC Drive profile (Instance 20/70 or 21/71).
14
MG.90.B2.02-VLTisaregisteredDanfosstrademark
Drive Profile
■
I/O Assembly Instances
■
The I/O Assembly Instance definitions in this section
define the format of the "data" attribute (attribute 3)
for I/O Assembly Instances. I/O Assemblies support
a hierarchy of motor control devices. The device
hierarchy includes motor starters, soft starters, AC
and DC drives, and servo drives. Assembly Instances
are numbered within the hierarchy so that each
device type is assigned a range of Assembly Instance
numbers, with higher functionality devices supporting
VLT®2800 / FCD 300 DeviceNet
higher instance numbers. Devices in the hierarchy
can choose to support instance numbers that are
lower than theirs in the hierarchy. For example an AC
drive may choose to support some I/O Assemblies
in the starter profile to make it easier to interchange
starters and drives within the system.
MG.90.B2.02 - VLT is a registered Danfoss trade mark
Drive Profile
15
Control Word and Status Word under
■
Instance 20/70
Set par
Instance 20/70 [12].
The control word in Instance 20 is defined as
follow
ameter 904 PPO type to select
ing:
Bit Bit = 0 Bit =1
00 Stop Run Fwd.
01 Reserved for future
use
Reserved for future
use
02 No function Fault reset
03 -15Reserved for future
use
Bit 0, Run Fwd:
Bit 0 = "0" means that the VLT frequency
converter has a stop command.
Bit 0 = "1" leads to a start command and the VLT
frequency converter will start to run the motor.
it 2, Fault Reset
B
Bit 0 = "0" means that there is no reset of a trip.
Bit 0 = "1" means that a trip is reset.
Reserved for future
use
VLT®2800 / FCD 300 DeviceNet
and 21/71.
ThestatuswordinInstance70isdefinedasfollowing:
Bit Bit = 0 Bit =1
00 No fault Trip
01 Reserved for future
use
02 Not running Running
03 -15Reserved for future
use
Bit 0,Fault:
Bit 0 = "0" means that there is no fault on
the VLT frequency converter.
Bit 0 = "1" means that there is a fault on the
VLT frequency converter.
B
it 2, Running
Bit 0 = "0" means that there is no active start command.
Bit 0 = "1" means that there is an active start command.
Regarding the Actual output speed, see section
Actual output speed, under Instance 20/70 and 21/71.
Reserved for future
use
Reserved for future
use
Regarding the Speed reference, see section Bus
speed reference value, under Instance 20/70
16
MG.90.B2.02-VLTisaregisteredDanfosstrademark
Control Word and Status Word
■
under Instance 21/71
Set par
Instance 21/71 [13].
The control word in Instance 21 is defined as
followi
ameter 904 PPO type 1 to select
ng:
Bit Bit = 0 Bit =1
00 Stop Run Fwd
01 Stop Run Rev
02 No function Fault reset
03
04
05 Net Ctrl
06 Net Ref
07 15
Bit 0, Run Fwd:
Bit 0 = "0" means that the VLT frequency
converter has a stop command.
Bit 0 = "1" leads to a start command and
the VLT frequency converter will start to run
the motor clockwise.
it 1, Run Rev:
B
Bit 0 = "0" leads to a stop of the motor.
Bit 0 = "1" leads to a start of the motor.
it 2, Fault Reset:
B
Bit 0 = "0" means that there is no reset of a trip.
Bit 0 = "1" means that a trip is reset.
it 5, Net Ref:
B
NB!:
Please note, that a change will have an
effect on parameter 502 - 506.
it 6, Net Crtl:
B
VLT®2800 / FCD 300 DeviceNet
ThestatuswordinInstance71isdefinedasfollowing:
Bit Bit = 0 Bit =1
00 Trip
01 Warning
02 Running 1 Fwd
03 Running 2 Rev.
04 Ready
05 Crtl from Net
06 Ref from Net
07 At reference
08 -15State Attribute
Bit 0,Fault:
Bit 0 = "0" means that there is no fault on
the VLT frequency converter.
Bit 0 = "1" means that there is a fault on the
VLT frequency converter.
B
it 1, Warning:
Bit 0 = "0" means that there is no unusual situation.
Bit 0 = "1" means that an abnormal condition
has arisen .
B
it 2, Running 1:
Bit2="0"meansthatthedriveisnotinoneof
these states or that Run 1 is not set.
Bit 2 = "1" means that the drive state attribute is
enabled or stopping , or that Fault-Stop and bit 0
(Run 1) of the CTW is set at the same time.
B
it 3, Running 2:
Bit 3 = "0" means means, that the drive is not in
one of these states or that Run 2 is not set.
Bit 3 = "1" means that the drive state attribute is
enabled or stopping , or that fault-stop and bit 0
(Run 2) of the CTW is set at the same time.
NB!:
Please note, that a change will have an effect
on parameter 214, 305, 307, 308 and 314.
Regarding the Speed reference, see section Bus
speed reference value, under Instance 20/70
and 21/71.
MG.90.B2.02 - VLT is a registered Danfoss trade mark
it 4, Ready:
B
Bit 4 = "0" means that the state attribute
is in another state.
Bit 4 = "1" means that the state attribute is
ready or enabled or stopping.
Drive Profile
17
Bit 5, Control from net:
Bit5="0"meansthatthedriveiscontrolled
from th
Bit 5 = "1" means that Devicenet has the control
(start, stop, reverse) of the drive.
B
Bit 6 = "0" means that the reference comes
from the drive’s inputs.
Bit 6 = "1" means that the reference is
coming from Devicenet.
B
Bit 7 = "0" means that the motor is running, but
that the present speed is different from the preset
speed
ramped up/down during start/stop.
Bit 7 = "1" means that the drive’s speed
equal
B
Represents the state attribute of the drive, as
indicated in the following table:
e standard inputs.
it 6, Ref from Net:
At reference:
it 7,
reference, i.e. while the speed is being
s the reference.
it 8 - 15, State attribute:
VLT®2800 / FCD 300 DeviceNet
Number Meaning
0 (Vendor specific)
1 Startup
2 Not ready
3 Ready
4 Enabled
5 Stopping
6 Fault stop
7 Faulted
Regarding the Actual output speed, see section Actual
output speed, under Instance 20/70 and 21/71
18
MG.90.B2.02-VLTisaregisteredDanfosstrademark
Bus speed reference value, under Instance
■
20/70 and 21/71
The speed reference value is transmitted to the VLT
frequency converter in the form of a 16-bit word. The
value is transmitted as a whole number. (Negative
figures are formatted by means of 2’s complement.)
us speed reference has the following format:
The b
Parameter 203 = "0" ["ref
00 Hex) [RPM] ⇒ + 32767 (7FFF Hex) [RPM]
0(00
Parameter 203 = "1" [- ref
67 (8000 Hex ) ⇒ +32767 [RPM] (7FFF Hex)
-327
MIN
MAX
⇒ ref
⇒ +ref
MAX
"]
MAX
]
VLT®2800 / FCD 300 DeviceNet
Actual output speed, under Instance 20/70
■
and 21/71
The value of the actual speed of the motor, is
transmitted in the form of a 16-bit word.
The value is transmitted as a whole number. (Negative
figures are formed by means of 2’s complement.)
The actual speed value has the following format:
-32767 (8000 Hex) [RPM] ⇒ +32767 [RPM]
(7FFF Hex) [RPM]
The actual reference [Ref. %] in the VLT depends
on the settings, in the following parameters:
104 Motor frequency
106 Motor Nom. speed
Max. Reference
205
Note that, If the bus speed reference is negative,
and the control word contains a run reverse
signal, the drive runs clockwise.
MG.90.B2.02 - VLT is a registered Danfoss trade mark
Drive Profile
19
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