Vacon optea User manual

installation manual
dual port ethernet board, opte9
ac drives
vacon®
advanced dual port ethernet board, optea

vacon • 3
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TABLE OF CONTENTS
Document: DPD01583G
Release date : 17/8/18
1. Safety...............................................................................................................6
1.1 Danger................................................................................................................................6
1.2 Warnings ............................................................................................................................7
1.3 Grounding and earth fault protection ................................................................................8
2. General information.........................................................................................9
2.1 New features - OPTEA .....................................................................................................11
2.2 New features - OPTE9......................................................................................................11
3. OPTEA/OPTE9 Ethernet board technical data ................................................12
3.1 General.............................................................................................................................12
3.2 Cables...............................................................................................................................12
4. Layout and connections..................................................................................13
4.1 Layout and connections ...................................................................................................13
4.2 LED Indications ................................................................................................................14
4.2.1 Profinet IO ........................................................................................................................15
4.3 Ethernet devices ..............................................................................................................16
4.3.1 Human to machine...........................................................................................................16
4.3.2 Machine to machine .........................................................................................................17
4.4 Connections and wiring....................................................................................................17
4.4.1 Topology: Star ..................................................................................................................18
4.4.2 Topology: Daisy Chain ......................................................................................................18
4.4.3 Topology: Ring..................................................................................................................19
4.5 ACD (Address Conflict Detection) ....................................................................................25
4.6 Time synchronization .......................................................................................................26
4.6.1 Using ID 2551 ...................................................................................................................26
4.6.2 SNTP (Simple Network Time Protocol) ...........................................................................26
5. Installation.....................................................................................................27
5.1 VACON® OPTEA Advanced Dual port Ethernet drive support........................................27
5.2 VACON® OPTE9 Dual Port Ethernet drive support.........................................................28
5.3 Installation in VACON® NX..............................................................................................29
5.4 Installation in VACON® 20...............................................................................................31
5.4.1 Enclosures MI1, MI2, MI3.................................................................................................31
5.4.2 Enclosures MI4, MI5.........................................................................................................34
5.5 Installation in VACON® 20 X and 20 CP ..........................................................................37
5.6 Installation in VACON® 100 family..................................................................................39
5.7 installation in VACON® 100 X ..........................................................................................42
5.8 PC Tools ...........................................................................................................................45
5.8.1 PC tool support ................................................................................................................45
5.8.2 Updating the OPTEA and OPTE9 option board firmware with VACON® Loader ............46
5.8.3 PC Tools for VACON® NX / NCIPConfig ..........................................................................49
5.8.4 PC Tools for VACON® NX / NCDrive ...............................................................................51
5.8.5 PC Tools for VACON® 100 family and VACON® 20 / VACON® Live...............................54
6. Commissioning ..............................................................................................57
6.1 Option board menu...........................................................................................................57
6.1.1 Option board parameters.................................................................................................57
6.1.2 Option board monitoring values ......................................................................................60
6.1.3 Communication protocol .................................................................................................61
6.1.4 IP Mode and IP settings ...................................................................................................62
6.1.5 Speed and duplex.............................................................................................................62
6.1.6 Communication timeout ..................................................................................................63
6.1.7 Profinet IO - Name of Station ..........................................................................................64

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6.1.8 EIP Input and Output instance .........................................................................................64
6.1.9 EIP Product code offset ...................................................................................................64
6.1.10 Mode.................................................................................................................................64
6.1.11 MAC Address....................................................................................................................65
6.1.12 Modbus Unit Identifier .....................................................................................................65
6.1.13 Media Redundancy ...........................................................................................................66
6.1.14 SNTP settings...................................................................................................................66
6.1.15 SNTP monitoring values ..................................................................................................68
6.1.16 System Redundancy.........................................................................................................68
6.2 Internal communication modes.......................................................................................68
6.3 Safety parameters............................................................................................................69
6.4 Control and status word monitoring values ....................................................................69
6.5 OPTCx emulation mode ...................................................................................................69
6.5.1 Modbus in emulation mode .............................................................................................70
6.5.2 EtherNet/IP in emulation mode.......................................................................................70
6.5.3 PROFINET in emulation mode .........................................................................................71
7. Modbus TCP / Modbus UDP ............................................................................72
7.1 Modbus UDP vs TCP.........................................................................................................73
7.2 Modbus communications.................................................................................................75
7.3 Data addresses in Modbus messages .............................................................................76
7.3.1 Modbus memory map ......................................................................................................76
7.3.2 Modbus data mapping......................................................................................................76
7.4 Modbus communication and connection timeout ...........................................................88
7.5 Quick setup.......................................................................................................................89
7.6 Modbus - example messages ..........................................................................................90
7.6.1 Example 1 - Write process data.......................................................................................90
7.6.2 Example 2 - Read process data .......................................................................................91
7.6.3 Example 3 - Exception response .....................................................................................92
8. PROFINET IO ..................................................................................................93
8.1 PROFIdrive 4.1 profile ......................................................................................................93
8.2 PROFIdrive 4.1 state machine..........................................................................................94
8.3 PROFINET IO process communication ............................................................................95
8.3.1 Choosing telegram type ...................................................................................................95
8.3.2 Telegram types ................................................................................................................96
8.3.3 Telegram building blocks ..............................................................................................104
8.3.4 Quick setup.....................................................................................................................108
8.4 PROFIdrive IO parameters.............................................................................................109
8.4.1 Parameters of the PROFIdrive.......................................................................................109
8.4.2 Vendor-specific PROFIdrive parameters.......................................................................111
8.4.3 PROFIdrive signal numbers...........................................................................................112
8.4.4 User specific record data...............................................................................................115
8.4.5 Base Mode Parameter Access Model............................................................................116
8.4.6 Parameter responses ....................................................................................................120
8.4.7 Drive parameter access using application ID................................................................124
8.4.8 Parameter channel examples .......................................................................................124
8.5 PROFINET IO communications and connection timeout...............................................131
8.6 System Redundancy.......................................................................................................132
8.7 Alarm system .................................................................................................................133
8.8 PROFIsafe.......................................................................................................................135
8.8.1 Overview .........................................................................................................................135
8.8.2 PROFIdrive on PROFIsafe ..............................................................................................136
9. EtherNet/IP..................................................................................................137
9.1 General information.......................................................................................................137
9.1.1 Overview .........................................................................................................................137

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9.1.2 AC/DC Drive Profile........................................................................................................137
9.1.3 EDS file ...........................................................................................................................137
9.1.4 LED functionality ............................................................................................................138
9.1.5 Explicit Messaging .........................................................................................................140
9.1.6 EtherNet/IP communication and connection timeout...................................................144
9.2 Common Industrial Objects implemented by OPTE9 ....................................................146
9.2.1 CIP Objects .....................................................................................................................146
9.2.2 Vendor Specific Objects .................................................................................................171
9.3 Supported assembly instances......................................................................................179
9.3.1 CIP I/O Assembly instances for AC/DC Drive ................................................................179
9.3.2 Vendor-specific I/O Assembly Instances.......................................................................185
9.3.3 Mapping of Standard Output Assemblies onto VACON® data......................................197
9.3.4 Mapping of VACON® data onto Standard Input Assemblies ........................................198
9.3.5 Special assembly instances...........................................................................................200
9.4 EtherNet/IP connection example ..................................................................................200
10. Fault tracing.................................................................................................202
10.1 Typical fault conditions ..................................................................................................202
10.2 Other fault conditions ....................................................................................................203
10.3 Fieldbus fault codes.......................................................................................................204
11. APPENDIX 1 - VACON® IO DATA DESCRIPTION............................................205
11.1 VACON® Control Word - FBFixedControlWord ............................................................205
11.2 Control Word bit support in VACON® AC drives ...........................................................207
11.3 Vacon® Status Word - FBFixedStatusWord..................................................................208
11.4 Status Word bit support in VACON® AC drives.............................................................209
11.5 Monitoring of Control & Status words in VACON® AC drives.......................................209
11.6 VACON® Speed reference and actual speed - FBSpeedReference
and FBActualSpeed ......................................................................................................210
11.7 Process data...................................................................................................................210
11.8 FIELDBUS PROCESS DATA MAPPING AND SCALING ..................................................211
12. APPENDIX 2 - EXAMPLE WITH SIEMENS PLC ..............................................214
12.1 Siemens STEP 7 .............................................................................................................214
12.2 Siemens TIA Portal ........................................................................................................223
13. APPENDIX 3 - EXAMPLE WITH SIEMENS SIMATIC PDM ...............................234
14. APPENDIX 4 - FIELDBUS PARAMETRISATION..............................................242
14.1 Fieldbus control and basic reference selection ............................................................242
14.2 Controlling Fieldbus Parameter....................................................................................243
14.3 Torque control parametrization ....................................................................................244
15. APPENDIX 5 - LWIP LICENCE .......................................................................245
16. Appendix 6 - Fieldbus option board communication ....................................246
16.1 Requirements for communication modes.....................................................................246
16.2 Fieldbus communication mode features and limitations .............................................247
16.3 Normal fieldbus communication ...................................................................................248
16.4 Fast fieldbus communication ........................................................................................249
16.5 Normal Extended Mode .................................................................................................249
16.6 Fast safety fieldbus communication..............................................................................250
16.7 Fast PROFIBUS fieldbus communication......................................................................250
17. APPENDIX 7 - parameters for application developers ................................. 251

1
vacon • 6 Safety
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1. SAFETY
This manual contains clearly marked cautions and warnings that are intended for your personal
safety and to avoid any unintentional damage to the product or connected appliances.
Read the information included in cautions and warnings carefully.
The cautions and warnings are marked as follows:
1.1 Danger
Table 1. Warning signs
= DANGER! Dangerous voltage
= WARNING or CAUTION
= Caution! Hot surface
The components of the power unit are live when the drive is connected to mains
potential. Coming into contact with this voltage is extremely dangerous and may
cause death or severe injury.
The motor terminals U, V, W and the brake resistor terminals are live when the
AC drive is connected to mains, even if the motor is not running.
After disconnecting the AC drive from the mains, wait until the indicators on the
keypad go out (if no keypad is attached, see the indicators on the cover). Wait 5
more minutes before doing any work on the connections of the drive. Do not open
the cover before this time has expired. After expiration of this time, use a
measuring equipment to absolutely ensure that no
voltage is present. Always
ensure absence of voltage before starting any electrical work!
The control I/O-terminals are isolated from the mains potential. However, the
relay outputs and other I/O-terminals may have a dangerous control voltage
present even when the AC drive is disconnected from mains.
Before connecting the AC drive to mains make sure that the front and cable
covers of the drive are closed.
During a ramp stop (see the Application Manual), the motor is still generating
voltage to the drive. Therefore, do not touch the components of the AC drive
before the motor has completely stopped. Wait until the indicators on the keypad
go out (if no keypad is attached, see the indicators on the cover). Wait additional 5
minutes before starting any work on the drive.
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1.2 Warnings
The AC drive is meant for fixed installations only.
Do not perform any measurements when the AC drive is connected to the mains.
The earth leakage current of the AC drives exceeds 3.5mA AC. According to
standard EN61800-5-1, a reinforced protective ground connection must be
ensured. See Chapter 1.3.
If the AC drive is used as a part of a machine, the machine manufacturer is
responsible for providing the machine with a supply disconnecting device (EN
60204-1).
Only spare parts delivered by VACON®can be used.
At power-up, power break or fault reset the motor will start immediately if the
start signal is active, unless the pulse control for
Start/Stop logic has been selected .
Furthermore, the I/O functionalities (including start inputs) may change if
parameters, applications or software are changed. Disconnect, therefore, the
motor if an unexpected start can cause danger.
The motor starts automatically after automatic fault reset if the auto restart
function is activated. See the Application Manual for more detailed information.
Prior to measurements on the motor or the motor cable, disconnect the motor
cable from the AC drive.
Do not touch the components on the circuit boards. Static voltage discharge may
damage the components.
Check that the EMC level of the AC drive corresponds to the requirements of your
supply network.
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vacon • 8 Safety
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1.3 Grounding and earth fault protection
The AC drive must always be earthed with an grounding conductor connected to the grounding
terminal marked with .
The earth leakage current of the drive exceeds 3.5mA AC. According to EN61800-5-1, one or more
of the following conditions for the associated protective circuit must be satisfied:
a) The protective conductor must have a cross-sectional area of at least 10 mm2 Cu or 16
mm2 Al, through its total run.
b) Where the protective conductor has a cross-sectional area of less than 10 mm2 Cu or 16
mm2 Al, a second protective conductor of at least the same cross-sectional area must be
provided up to a point where the protective conductor has a cross-sectional area not less
than 10 mm2 Cu or 16 mm2 Al.
c) Automatic disconnection of the supply in case of loss of continuity of the protective
conductor.
The cross-sectional area of every protective grounding conductor which does not form part of the
supply cable or cable enclosure must, in any case, be not less than:
-2.5mm
2if mechanical protection is provided or
-4mm
2if mechanical protection is not provided.
The earth fault protection inside the AC drive protects only the drive itself against earth faults in the
motor or the motor cable. It is not intended for personal safety.
Due to the high capacitive currents present in the AC drive, fault current protective switches may
not function properly.
CAUTION!
Do not perform any voltage withstand tests on any part of the AC drive. There is
a certain procedure according to which the tests must be performed. Ignoring
this procedure can cause damage to the product.
NOTE! You can download the English and French product manuals with applicable safety,
warning and caution information from https://www.danfoss.com/en/service-and-support/.
REMARQUE Vous pouvez télécharger les versions anglaise et française des manuels produit
contenant l’ensemble des informations de sécurité, avertissements et mises en garde
applicables sur le site https://www.danfoss.com/en/service-and-support/.
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2. GENERAL INFORMATION
The VACON®AC drives can be connected to the Ethernet networks using the VACON®OPTEA
Advanced Dual Port Ethernet fieldbus option board (OPTEA) and the VACON®OPTE9 Dual Port
Ethernet fieldbus option board (OPTE9). The drives can be daisy chained by utilizing two Ethernet
ports. The option boards support PROFINET IO, Ethernet/IP, Modbus TCP and Modbus UDP fieldbus
protocols. The Advanced Dual Port Ethernet board (OPTEA) also supports PROFINET IO with
PROFIsafe in combination with OPTBL/OPTBM/OPTBN option board. In addition, OPTEA also
supports advanced features such as PROFINET System Redundancy "S2". OPTEA can be used alone
as PROFINET IO device, but PROFIsafe always requires OPTBL/OPTBM/OPTBN option board and
VACON®NXP control too. The following network topologies are supported. See details in
Chapter 4.4 "Connections and wiring".
•Star
•Daisychain
•Ring
Every appliance connected to an Ethernet network has two identifiers: a MAC address and an IP
address. The MAC address (Address format: xx:xx:xx:xx:xx:xx) is unique for each appliance and
cannot be changed.The Ethernet board’s MAC address can be found on the sticker attached to the
board. “EtherNet/IPTM is a trademark of ODVA, Inc.
In a local network, IP addresses can be defined by the user as long as all the units connected to the
network are given the same network portion of the address. Overlapping IP addresses cause
conflicts between appliances. For more information about setting IP addresses, see Chapter 6
"Commissioning".
Table 2. List of abbreviations used in this document
Abbreviation Explanation
ACD Address Conflict Detection
CRC Cyclic Redundancy Check is an error-detecting code commonly used in
fieldbusses to detect accidental changes to raw data.
DHCP Dynamic Host Configuration Protocol is used for dynamical resolving of net-
work configuration parameters like an IP address.
FB Fieldbus
GW Gateway
HI Upper 8/16 bits in a 16/32 bit value.
LO Lower 8/16 bits in a 16/32 bit value.
LWIP Light weight TCP/IP protocol stack for embedded systems.
Modbus TCP /
Modbus UDP
Simple and vendor-neutral communication protocol intended for monitoring
and controlling of field devices.
PDI Process data in (Profinet IO)
PDO Process data out (Profinet IO)
PHY(X) Ethernet physical interface X, where X represents the number
of interface
PLC Programmable Logic Controller
PNU Parameter number (Profinet IO)
Profinet IO Profinet is a standard for industrial automation in Ethernet network. Profi-
net IO describes the exchange of data between controllers and field devices.
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RSTP Rapid Spanning Tree Protocol
SNTP Simple Network Time Protocol
TCP
Transmission Control Layer provides reliable, ordered and error-checked
delivery of data streams between computers that are connected to a local
area network.
UTC Coordinated Universal Time
SNMP Simple Network Management Protocol
MIB Management Information Base
DLR Device Level Ring
CIP Common Industrial Protocol
RDHT Redundancy Data Hold Time
LLDP Link Layer Discovery Protocol
LED Light-Emitting Diode
MRP Media Ring Protocol
MRM Media Ring Master
MRC Media Ring Client
ARP Address Resolution Protocol
DCP Discovery and Basic Configuration Protocol
HD Half Duplex
FD Full Duplex
STW1 Steuerwort 1 (German for control word 1)
ZSW1 Zustandwort 1 (German for status word 1)
NSOLL Sollwert (German for reference value)
NIST Istwert (German for actual value)
EDD Electronic Device Description
EDS Electronic Data Sheet
GSDML General Station Description Markup Language
Table 3. List of data types used in this document
Type name Bit size Explanation
INT8 8 Signed short integer
UINT8 8 Unsigned short integer
INT16 16 Signed integer
UINT16 16 Unsigned integer
INT32 32 Signed long integer
UINT32 32 Unsigned long integer
FLOAT32 32 32-bit floating point
STRING3 24 Three byte string
STRING5 40 Five byte string
Table 2. List of abbreviations used in this document
Abbreviation Explanation

General information vacon • 11
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2.1 New features - OPTEA
The following table shows the new features that are added in the OPTEA Advanced Dual Port
Ethernet's firmware version.
Table 4. New features - OPTEA
PROFISAFE is supported in NXP only when OPTBL/M/N is also installed.
2.2 New features - OPTE9
The following table shows the new features that are added in the OPTE9 Dual Port Ethernet's
firmware versions.
New feature Firmware version
PROFINET IO + PROFIsafe V001
Support for all features supported by OPTE9 board
including EtherNet/IP and Modbus TCP/UDP protocols V002
Improved emulation mode with OPTCP, OPTCQ and
OPTCI boards when installed to VACON®NXP V002
PROFINET IO System Redundancy "S2" V002
Table 5. New features - OPTE9
New feature Firmware version
EtherNet/IP protocol V004
Ethernet ring support (RSTP) V004
Address Conflict Detection (ACD) V004
Media Redundancy Protocol (MRP) V006
Simple Network Management Protocol (SNMP) V006
LLDP-MIB, LLDP-EXT-DOT3-MIB, LLDP-EXT-PNO-MIB V006
EDD files SIMATIC PDM V006
Fast communication modes in VACON® NXP V007
PROFINET IO Alarms V007
Simple Network Time Protocol (SNTP) V008
Fast MRP support verified V008
Device Level Ring (DLR) V009

3
vacon • 12 OPTEA/OPTE9 Ethernet board technical
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3. OPTEA/OPTE9 ETHERNET BOARD TECHNICAL DATA
3.1 General
3.2 Cables
For connecting the fieldbus Ethernet boards, use only Ethernet cables that meet at least the
requirements of category 5 (CAT5) according to EN 50173 or ISO/IEC 11801.
Table 6. Technical data
General Board name OPTEA/OPTE9
Ethernet connections Interface Two RJ-45 connectors
Transfer cable Shielded Twisted Pair (STP) CAT5e
Communications
Speed 10 / 100 Mb
Duplex half / full
Default IP-address By default the board is in DHCP mode
Protocol Modbus TCP, Modbus UDP, Profinet I/O, EtherNet/IP
Environment
Ambient operating tem-
perature -10°C…50°C
Storing temperature -40°C…70°C
Humidity <95%, no condensation allowed
Altitude Max. 1000 m
Vibration 0.5 G at 9...200 Hz
Safety Fulfills EN50178 standard

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4. LAYOUT AND CONNECTIONS
The VACON®Ethernet option boards are connected to the Ethernet bus using the standard RJ45
connectors (1 and 2). The communication between the control board and the AC drive takes place
through a standard VACON®Interface Board Connector. OPTEA and OPTE9 boards have identical
layout and connections.
4.1 Layout and connections
Figure 1. Option board layout
A Ethernet connector C Interface Board connector
B Ethernet connector
Table 7. Ethernet ports
Ethernet port Description
1 Ethernet port 1 (PHY1)
2 Ethernet port 2 (PHY2)
RN ER BS
A
B C
1
2
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vacon • 14 Layout and connections
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4.2 LED Indications
Figure 2. Option board LED indicators
The table below lists possible LED combinations and their meanings. When the EtherNet/IP is
active, the option board follows CIP standard for LED indications. Therefore, the indications
described in Table 8 do not apply. See Chapter 9.1.4 "LED functionality".
Table 8. List of possible LED combinations
ALEDindications
LED combinations Description
No power. All LEDs are OFF.
Option board firmware is corrupted or its software is missing.
ER is blinking (0.25s ON / 0.25s OFF)
Option board failure. Option board is not operational. BS is red
and ER is possibly blinking (2.5s ON / 2.5s OFF)
Option board is operational.
Protocol is ready for communications. RN is blinking (2.5s ON /
2.5s OFF).
RN ER BS
A1
2
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Layout and connections vacon • 15
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4.2.1 Profinet IO
When using the "Node Flashing Test" function, you can determine to which device you are directly
connected. For example, in Siemens S7, by using the menu command "PLC > Diagnostics/Setting >
Node Flashing Test..." you can identify the station directly connected to the PG/PC if all three LEDs
are flashing green.
Protocol is communicating.
Protocol communication fault. ER is blinking to indicate a fault.
RN is blinking to indicate that protocol is again ready for
communications.
Protocol is communicating with an active fault. ER is blinking.
Duplicate IP address detected. RN is blinking.
Profinet IO only! In node flashing test all three LEDs are
blinking.
If option board detects hardware failure or some other non-
recoverable fault situation, it will generate a slot fault (F54) and
all three LEDs are red. Try to update option board firmware. If
situation is not resolved with the update, you may need to
replace the option board.
LED combinations Description

4
vacon • 16 Layout and connections
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4.3 Ethernet devices
The common-use cases of Ethernet devices are 'human to machine' and 'machine to machine'. The
basic features of these two cases are presented in the pictures below.
4.3.1 Human to machine
Requirements:
- Graphical User Interface
- Relatively slow communication in use
Figure 3. Ethernet , Human to Machine
NOTE! NCDrive can be used in VACON®NXS and NXP drives via Ethernet. VACON®Live can be used
with VACON®100 family.
NOTE! The Ethernet connection to VACON®20, VACON®20 X and VACON®20 CP via the OPTE9 Dual
Port Ethernet is not supported. OPTEA Advanced Dual Port Ethernet board does not support
VACON®20, VACON®20 X or VACON®20 CP.
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Vacon PC tools interface
- Parameters
- Slow rate actual
Values:
- Trends
- Fault history
Ethernet switch

Layout and connections vacon • 17
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4.3.2 Machine to machine
Requirements:
- Industrial environment
- Fast communication in use
Figure 4. Ethernet, Machine to Machine
4.4 Connections and wiring
The option boards have two Ethernet ports and an embedded switch. An option board is seen in
network as a single device as it has only one MAC and IP address. This configuration enables three
different topologies:
• Star (see Chapter 4.4.1 "Topology: Star")
• Daisy chain (see Chapter 4.4.2 "Topology: Daisy Chain")
• Ring (see Chapter 4.4.3 "Topology: Ring")
Each of these topologies has their own advantages and disadvantages. When designing the network
you must carefully consider the risks and benefits against the cost of the selected topology.
Both boards support 10/100 Mb speeds in both Full- and Half-duplex modes. However, real-time
process control requires the Full-duplex mode and the 100-megabit speed. The boards must be
connected to the Ethernet network with a Shielded Twisted Pair (STP) CAT-5e cable (or better).
Use only industrial standard components in the network and avoid complex structures to minimize
the length of response time and the amount of incorrect dispatches. Both option boards have an
internal switch, so it does not matter in which port of the option board the Ethernet cables are
connected to.
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MASTER
Real-Time Control
- Start/Stop, Direction,...
- Reference
- Feedback
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vacon • 18 Layout and connections
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4.4.1 Topology: Star
In star network, all the devices are connected to the same switch(es). This topology reduces the
damage caused by single cable failure. It would affect only to a single drive instead of them all. In
this setup, a drive will receive only broadcast/multicast messages and messages directed to this
drive.
Only one port from the option board can be connected to a switch in the star topology. Connecting
both ports to switch(es) will cause an involuntary Ethernet ring which, in this setup, will break the
network.
Figure 5. Star Topology
4.4.2 Topology: Daisy Chain
The daisy-chaining allows you to reduce the costs for cabling and networking equipment such as
switches. The maximum number of daisy-chained boards is 32. This restriction comes from the
average latency (20 to 40 microseconds) per Ethernet switch. The drawback in the daisy chain
topology is that it increases traffic in all except the last drive. The first drive in the daisy chain sees
all the traffic in the chain. Also damage to a single cable will drop all drives behind it from the
network.
Both in daisy chain topology and in star topology, the last drive's port must not be connected back
to the same line. This would cause an involuntary Ethernet ring which will break the network.
Figure 6. Daisy chain topology
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DRIVE
OPTE9-1
DRIVE
...
OPTE9-2
DRIVE
OPTE9-3
DRIVE
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DRIVE
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DRIVE
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OPTE9-8
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Layout and connections vacon • 19
Local contacts: https://www.danfoss.com/en/contact-us/contacts-list/ 4
4.4.3 Topology: Ring
In some cases it is possible to use a ring topology. The ring topology gains the same reduced cabling
cost as the daisy chain topology, but decreases the damage caused by a single cable failure.
Both Ethernet boards can be used with the following media redundancy protocols:
NOTE! Ring network sizes should be limited from what is specified in the media redundancy
protocols (usually up to 50 nodes) depending on the network load. When low I/O data intervals are
used, we recommend that ring networks should be limited to fewer than 32 devices. High load on
network can cause recovery times to increase and in worst cases to trigger a watchdog failure.
4.4.3.1 Rapid Spanning Tree Protocol (RSTP)
To use the RSTP protocol, add a managed Ethernet switch that supports the RSTP protocol. If a
single link is broken, the RSTP switch will notice this and start sending data from the PLC to both
directions effectively creating two daisy chains. When the link has been repaired, the switch will
notice this too and reverts back to normal operating mode. Compared to the star topology, the ring
topology adds more network traffic to almost all drives. Damage to two cables will always create an
isolated subnetwork.
In the RSTP configuration, one of the ports in the switch is "Designated Port" (DP) and the other
"Alternative Port" (AP). When the network is functioning properly, the traffic flows through the
designated port. Only the BPDU (Bridge Protocol Data Unit) packets are transferred through the AP
port. The BPDU packets are used by the switch to determine if the network is working properly. If it
detects that the BPDU packets do not go through the ring, it will change the alternative port to a
second designated port. Now the switch will send packets to both directions in the broken ring (see
Figure 8).
Each designated port has a list of MAC addresses which are behind that port. Only frames directed
to the device in the MAC list are forwarded into that designated port. The broadcast and multicast
frames are sent to all designated ports.
Table 9. Supported media redundancy protocols
Protocol Active fieldbus protocol Recovery time
RSTP Any Seconds
MRP PROFINET < 200 ms (typical)
< 50 or < 10 ms with Fast-MRP
DLR EtherNet/IP ~4 ms

4
vacon • 20 Layout and connections
Local contacts: https://www.danfoss.com/en/contact-us/contacts-list/
Figure 7. Ring topology
In the example below, the Ethernet communication will be interrupted to device number three and
other devices after that when the link is broken. The Fieldbus communication maybe faulted when
the link is broken, but when the switch enables the second designated port, the connections can be
reopened. In the RSTP protocol, it generally takes few seconds before the second designated port
will be activated. This depends on the BPDU exchange cycle, which is 2 seconds by default.
Figure 8. Ring topology: Error in network
NOTE! The switch in Ethernet boards itself does not implement the RSTP protocol, so the network
will always need a third party switch to support it.
NOTE! Do not use RSTP together with PROFIsafe. Recovery time in RSTP network can be several
seconds, and recovery time in STP network can be several tens of seconds. To compensate this, the
PROFIsafe watchdog time must be set long enough so that slow recovery time of RSTP network can
be tolerated. However, for example, in Siemens TIA portal, the longest PROFIsafe watchdog time
setting is 1920 ms, and this is too short for RSTP.
PLC
Managed switch with RSTP support
DRIVE
OPTE9-1
DRIVE
...
OPTE9-2
DRIVE
OPTE9-3
DRIVE
11661_uk
OPTE9-8
Power
12
DP AP
345678
PLC
Managed switch with RSTP support
DRIVE
OPTE9-1
DRIVE
...
OPTE9-2
DRIVE
OPTE9-3
DRIVE
11662_uk
OPTE9-8
Power
12
DP DP
345678