Beckhoff KL2791-0000, KL2791-0011, KS2791-0011, KS2791-0000, KL2791-1200 Documentation
Documentation
KL2791
Single channel speed controller terminals for AC motors
Version:
Date:
2.0.0
2017-08-25
Table of contents
Table of contents
1 Foreword ....................................................................................................................................................5
1.1 Notes on the documentation........................................................................................................... 5
1.2 Safety instructions .......................................................................................................................... 6
1.3 Documentation issue status............................................................................................................ 7
2 Product overview.......................................................................................................................................8
2.1 Introduction ..................................................................................................................................... 8
2.2 Basic function principles ................................................................................................................. 9
2.3 Technical data .............................................................................................................................. 10
2.4 LED displays................................................................................................................................. 11
3 Mounting and wiring ...............................................................................................................................12
3.1 Installation on mounting rails ........................................................................................................ 12
3.2 Connection.................................................................................................................................... 14
3.2.1 Connection system...........................................................................................................14
3.2.2 Wiring...............................................................................................................................16
3.2.3 Pin assignment.................................................................................................................18
3.3 Notes on operation ....................................................................................................................... 20
4 Application examples - overview ...........................................................................................................21
4.1 KL2791-0000 - application example ............................................................................................. 21
4.2 KL2791-0011 - application example ............................................................................................. 22
5 Configuration Software KS2000.............................................................................................................23
5.1 KS2000 - Introduction ................................................................................................................... 23
5.2 Parameterization with KS2000 ..................................................................................................... 25
5.3 Register ........................................................................................................................................ 27
5.4 Settings......................................................................................................................................... 28
5.5 Process data................................................................................................................................. 30
6 Access from the user program ..............................................................................................................32
6.1 Process image .............................................................................................................................. 32
6.2 Control and status bytes ............................................................................................................... 32
6.3 Register overview ......................................................................................................................... 34
6.4 Register description ...................................................................................................................... 35
6.5 Examples of Register Communication.......................................................................................... 37
6.5.1 Example 1: reading the firmware version from Register 9 ...............................................37
6.5.2 Example 2: Writing to an user register.............................................................................37
7 Appendix ..................................................................................................................................................40
7.1 Support and Service ..................................................................................................................... 40
KL2791 3Version: 2.0.0
Table of contents
KL27914 Version: 2.0.0
Foreword
1 Foreword
1.1 Notes on the documentation
Intended audience
This description is only intended for the use of trained specialists in control and automation engineering who
are familiar with the applicable national standards.
It is essential that the documentation and the following notes and explanations are followed when installing
and commissioning these components.
It is the duty of the technical personnel to use the documentation published at the respective time of each
installation and commissioning.
The responsible staff must ensure that the application or use of the products described satisfy all the
requirements for safety, including all the relevant laws, regulations, guidelines and standards.
Disclaimer
The documentation has been prepared with care. The products described are, however, constantly under
development.
We reserve the right to revise and change the documentation at any time and without prior announcement.
No claims for the modification of products that have already been supplied may be made on the basis of the
data, diagrams and descriptions in this documentation.
Trademarks
Beckhoff®, TwinCAT®, EtherCAT®, Safety over EtherCAT®, TwinSAFE®, XFC® and XTS® are registered
trademarks of and licensed by Beckhoff Automation GmbH.
Other designations used in this publication may be trademarks whose use by third parties for their own
purposes could violate the rights of the owners.
Patent Pending
The EtherCAT Technology is covered, including but not limited to the following patent applications and
patents: EP1590927, EP1789857, DE102004044764, DE102007017835 with corresponding applications or
registrations in various other countries.
The TwinCAT Technology is covered, including but not limited to the following patent applications and
patents: EP0851348, US6167425 with corresponding applications or registrations in various other countries.
EtherCAT® is registered trademark and patented technology, licensed by Beckhoff Automation GmbH,
Germany
Copyright
© Beckhoff Automation GmbH & Co. KG, Germany.
The reproduction, distribution and utilization of this document as well as the communication of its contents to
others without express authorization are prohibited.
Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a
patent, utility model or design.
KL2791 5Version: 2.0.0
Foreword
1.2 Safety instructions
Safety regulations
Please note the following safety instructions and explanations!
Product-specific safety instructions can be found on following pages or in the areas mounting, wiring,
commissioning etc.
Exclusion of liability
All the components are supplied in particular hardware and software configurations appropriate for the
application. Modifications to hardware or software configurations other than those described in the
documentation are not permitted, and nullify the liability of Beckhoff Automation GmbH & Co. KG.
Personnel qualification
This description is only intended for trained specialists in control, automation and drive engineering who are
familiar with the applicable national standards.
Description of symbols
In this documentation the following symbols are used with an accompanying safety instruction or note. The
safety instructions must be read carefully and followed without fail!
DANGER
WARNING
CAUTION
Attention
Note
Serious risk of injury!
Failure to follow the safety instructions associated with this symbol directly endangers the
life and health of persons.
Risk of injury!
Failure to follow the safety instructions associated with this symbol endangers the life and
health of persons.
Personal injuries!
Failure to follow the safety instructions associated with this symbol can lead to injuries to
persons.
Damage to the environment or devices
Failure to follow the instructions associated with this symbol can lead to damage to the environment or equipment.
Tip or pointer
This symbol indicates information that contributes to better understanding.
KL27916 Version: 2.0.0
1.3 Documentation issue status
Version Comment
2.0.0 • Migration
1.2.0 • Set mode leading edge phase control added
• Installation and wiring updated
• Technical data updated
• Preface updated
1.1.0 Increased power rating of 200VA for KL2791-0000 and KL2791-0011 approved
1.0.0 First public issue
0.1 First internal preliminary version
Firmware and hardware versions
Foreword
Version of the
documentation
2.0.0 3A 05 1B 03
1.2.0 3A 05 1B 03
1.1.0 1B 03 1B 03
1.0.0 1A 00 1A 00
0.1 1A 00 - -
The firmware and hardware versions (delivery state) can be taken from the serial number printed on the side
of the terminal.
Syntax of the serial number
Structure of the serial number: WWYYFFHH
WW - week of production (calendar week)
YY - year of production
FF - firmware version
HH - hardware version
Example with ser. no.: 24 08 1A 00:
24 - week of production 24
08 - year of production 2008
1A - firmware version 1A
00 - hardware version 00
KL2791-0000, KS2791-0000,
KL2791-0011, KS2791-0011
Firmware Hardware Firmware Hardware
KL2791-1200
KL2791 7Version: 2.0.0
Product overview
2 Product overview
2.1 Introduction
Fig.1: KL2791
In many industrialized countries, electric motors account for more than the half the current consumption,
which means there is huge energy-saving potential.
With the aid of speed control, it is quite easily possible to reduce the energy consumption to the level that is
actually required, thereby avoiding energy waste.
Beckhoff has extended its Bus Terminal system for this purpose. The KL2791 Bus Terminal is suitable for
use as a speed controller for single-phase AC motors up to 100VA.
In addition to energy conservation speed reduction offers noise reduction and increased motor service life.
The speed controller is extremely compact and is housed in a standard bus terminal with a width of 12mm.
The KL2791 Bus Terminal can be used in any bus system that is supported by the Beckhoff Bus Terminal
system.
It is designed for direct connection of low-power, single-phase AC motors.
The KL2791 enables speed reduction of typical motors such as capacitor motors, universal motors and
shaded-pole motors.
The KL2791-0011 is a version without power contacts (see ladder diagram on the right). This can be used
for 230V even without a special power feed terminal.
The KL2791-1200 is specifically designed for 120V mains voltage.
Other KS2791 variants feature pluggable wiring.
KL27918 Version: 2.0.0
2.2 Basic function principles
Product overview
Fig.2: Basic KL2791 function principles
The motor is switched on and off with a practice-proven mains-synchronous pattern, so that the motor
consumes less power and the speed falls significantly.
This method is well suited to motors with fixed loads, such as pumps and fans, in order to achieve a control
range for the flow rate from 10% to 100%.
The KL2791 Bus Terminal enables direct connection of single-phase AC motors up to 100VA.
In this way the speed of capacitor, universal and shaded-pole motors can be reduced simply.
The set values are specified via the process data. The required output power is specified via a 16bit
representation. 3 different setting modes are available:
• Full-wave control
• Leading edge phase control is ideal for smooth operation
• Mixed control
Full-wave control is used for targeted switching on and off at optimized points in time.
This protects the connected motor and is particularly suitable for drives with a quadratic load characteristic,
such as fans or pumps.
Leading edge phase control is ideal for smooth operation.
Mixed control offers a compromise between smooth operation and motor protection.
Please follow the operation instructions
Also read the Notes on operation [}20] in the chapter Mounting and wiring.
Attention
KL2791 9Version: 2.0.0
Product overview
2.3 Technical data
Technical data KL2791-0000, KS2791-0000,
KL2791-1200
KL2791-0011, KS2791-0011
Mains voltage 230V
AC
120V
AC
Power rating 200VA (W), max. 0,9A 100VA (W), max.
0,85A
Load types Single-phase AC motors
Types of control Full-wave control, mixed control
Resolution 1%
Leakage current (OFF state) < 1mA
Electrical isolation 500V (K-bus /field voltage), 3750VAC (1min.)
Power supply for the electronics via the K-bus
Current consumption from K-bus typically 95mA
Bit width in the input process image 1 x 16bit data, 1 x 8bit status
Bit width in the output process image 1 x 16bit data, 1 x 8bit control
Configuration via the Bus Coupler or the controller
Weight approx. 60g
Permissible ambient temperature range
0°C ... + 55°C
during operation
Permissible ambient temperature range
-25°C ... + 85°C
during storage
Permissible relative air humidity 95%, no condensation
Dimensions (W x H x D) approx. 15mmx100mmx70mm (width aligned: 12mm)
Mounting on 35mm mounting rail conforms to EN60715
Vibration/shock resistance conforms to EN60068-2-6/ EN60068-2-27
EMC immunity/emission conforms to EN61000-6-2/ EN61000-6-4
Protection class IP20
Installation position variable
Pluggable wiring for all KSxxxx terminals
Approval CE
KL279110 Version: 2.0.0
2.4 LED displays
Fig.3: LEDs
LED Display
K-Bus run (green) off no data transfer on the K-bus
on Data transmission on the K-bus is active
Sync (green) off • Terminal is not synchronized with the mains*
on • Terminal has synchronized itself with the mains*
ON (green) off Process data are zero
on Process data are not zero
Error (red) on A load-side overcurrent was detected
Product overview
*) Synchronization with the mains can only occur if a load is connected!
Risk of electric shock!
With the Sync LED switched off mains voltage may still be present at the KL2791 output!
WARNING
At this stage, the synchronization was not yet performed!
KL2791 11Version: 2.0.0
Mounting and wiring
3 Mounting and wiring
3.1 Installation on mounting rails
Risk of electric shock and damage of device!
Bring the bus terminal system into a safe, powered down state before starting installation,
WARNING
Assembly
disassembly or wiring of the Bus Terminals!
Fig.4: Attaching on mounting rail
The Bus Coupler and Bus Terminals are attached to commercially available 35mm mounting rails (DIN rails
according to EN60715) by applying slight pressure:
1. First attach the Fieldbus Coupler to the mounting rail.
2. The Bus Terminals are now attached on the right-hand side of the Fieldbus Coupler. Join the components with tongue and groove and push the terminals against the mounting rail, until the lock clicks
onto the mounting rail.
If the Terminals are clipped onto the mounting rail first and then pushed together without tongue and
groove, the connection will not be operational! When correctly assembled, no significant gap should
be visible between the housings.
Fixing of mounting rails
The locking mechanism of the terminals and couplers extends to the profile of the mounting
Note
rail. At the installation, the locking mechanism of the components must not come into conflict with the fixing bolts of the mounting rail. To mount the mounting rails with a height of
7.5mm under the terminals and couplers, you should use flat mounting connections (e.g.
countersunk screws or blind rivets).
KL279112 Version: 2.0.0
Mounting and wiring
Disassembly
Fig.5: Disassembling of terminal
Each terminal is secured by a lock on the mounting rail, which must be released for disassembly:
1. Pull the terminal by its orange-colored lugs approximately 1cm away from the mounting rail. In doing
so for this terminal the mounting rail lock is released automatically and you can pull the terminal out of
the bus terminal block easily without excessive force.
2. Grasp the released terminal with thumb and index finger simultaneous at the upper and lower grooved
housing surfaces and pull the terminal out of the bus terminal block.
Connections within a bus terminal block
The electric connections between the Bus Coupler and the Bus Terminals are automatically realized by
joining the components:
• The six spring contacts of the K-Bus/E-Bus deal with the transfer of the data and the supply of the Bus
Terminal electronics.
• The power contacts deal with the supply for the field electronics and thus represent a supply rail within
the bus terminal block. The power contacts are supplied via terminals on the Bus Coupler (up to 24V)
or for higher voltages via power feed terminals.
Power Contacts
During the design of a bus terminal block, the pin assignment of the individual Bus Termi-
Note
PE power contact
nals must be taken account of, since some types (e.g. analog Bus Terminals or digital 4channel Bus Terminals) do not or not fully loop through the power contacts. Power Feed
Terminals (KL91xx, KL92xx or EL91xx, EL92xx) interrupt the power contacts and thus represent the start of a new supply rail.
The power contact labeled PE can be used as a protective earth. For safety reasons this contact mates first
when plugging together, and can ground short-circuit currents of up to 125A.
KL2791 13Version: 2.0.0
Loading...