Related Manuals for Beckhoff BK75 series
Summary of Contents for Beckhoff BK75 series
- Page 1 SERCOS Coupler ( Serial Real Time Communication System ) BK7500 Valid for all BK75xx Bus Coupler Technical Hardware Documentation Version 1.1 2006-10-30...
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Page 2: Table Of Contents
Liability Conditions Delivery conditions Copyright Safety Instructions State at Delivery Description of safety symbols 2. Basic information The Beckhoff bus terminal system The interfaces Power supply Power supply to the power contacts Power contacts Fieldbus connection Configuration interface K-bus contacts... -
Page 3: Foreword
In addition, the general delivery conditions of the company Beckhoff Automation GmbH apply. Copyright © This documentation is copyrighted. Any reproduction or third party use of this publication, whether in whole or in part, without the written permission of Beckhoff Automation GmbH, is forbidden. BK7500... -
Page 4: Safety Instructions
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. Description of safety symbols The following safety symbols are used in this documentation. -
Page 5: Basic Information
The Beckhoff bus terminal system combines the advantages of a bus system with the functionality of compact terminals. Bus terminals can be... - Page 6 Basic information Power input terminals Three power contacts pass the operating power to the following terminals. You can use power input terminals to subdivide the terminal row as desired separately powered groups into groups, each with a separate power supply. These power input terminals are not taken into account for addressing the terminals, you can insert them at any position along the terminal row.
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Page 7: The Interfaces
Basic information The interfaces There are six ways of making a connection to a bus coupler. These interfaces are designed as plug connections and spring terminals. The Beckhoff-SERCOS - coupler BK7500 Power supply 24 V DC on the topmost The bus couplers need an operating power of 24 V DC which is connected terminals via the topmost spring terminals, labeled "24 V”... -
Page 8: Fieldbus Connection
Basic information Fieldbus connection There is a recessed front face on the left hand side. The typical SERCOS SERCOS Fibre optic connecting plugs can be inserted here. SERCOS consists of a fiber-optic conductor ring into which the bus coupler is inserted. You need a fiber- Plug SERCOS Z1003 optic conductor connector type SERCOS Z1003 for connection. -
Page 9: The Operating Modes Of The Bus Coupler
Basic information The operating modes of the bus coupler When it is first switched on the bus coupler carries out a self-test to check the functions of its components and the communications of the K bus, and while this is going on the red I/O LED will flash. When the self-test has been completed successfully, the bus coupler will begin to test the attached bus terminals (the "bus terminal test”) and read in the configuration from which it constructs an internal structure list, which is not... - Page 10 Basic information Master Data Telegram (MDT) The MDT is sent by the master as a broadcast to all devices. It contains the data for all the slave devices. Because of different configurations, the data length can vary. Drive Telegram (AT) Each slave sends its output data in the appropriate time slot.
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Page 11: Mechanical Construction And Mounting
Basic information Mechanical construction and mounting The Beckhoff bus terminal system is remarkable for its compact construction and high degree of modularity. When you design the installation you will need to plan for one bus coupler and some number of bus terminals. - Page 12 Basic information can then insert the wire into the terminal without any obstruction. When you release the pressure the terminal will automatically close and hold the wire securely and permanently. The connection between bus couplers and bus terminals is automatically effected by latching the components together.
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Page 13: Electrical Data
Using a special power supply terminal (KL9400), power can be fed back into the K-bus at any chosen point. If you wish to use a power supply terminal, please contact Beckhoff’s technical support. . BK7500... -
Page 14: The Peripheral Data In The Process Image
Basic information The peripheral data in the process image When the bus coupler is first switched on it determines the configuration of the attached input/output terminals and automatically assigns the physical slots of the input/output channels to the addresses in the process image. The bus coupler sets up an internal list of assignments in which each of the input and output channels has a specific position in the process image. - Page 15 Basic information Function type of the channel Assignment level Analog outputs byte-wise assignment Digital outputs bit-wise assignment Analog inputs byte-wise assignment Digital inputs bit-wise assignment Analog inputs/ouputs are representative of other complex multi-byte signal bus terminals (RS232, SSI sensor interface, ...) Overview of the subdivision of the process image in the bus coupler: Output data in the bus coupler...
- Page 16 Basic information Data consistency Data which contains no contradictions is said to be consistent. The following consistency is required here: 1. The high byte and low byte of an analog value (word consistency), 2. The control/status byte and the corresponding parameter word for accessing the register.
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Page 17: Starting Operation And Diagnostics
Basic information Starting operation and diagnostics After switching on, the bus coupler immediately checks the connected configuration. Error-free start-up is signalled by extinction of the red LED “I/O ERR“. If the “I/O ERR” LED blinks, an error in the area of the terminals is indicated. -
Page 18: Terminal Bus Error
Basic information Terminal bus error Error code Error code Description Remedy argument Persistent, EMC problems - Check power supply for overvoltage or continuous undervoltage peaks blinking - Implement EMC measures - If a K-bus error is present, it can be localised by a restart of the coupler (by switching it off and then on again) 1 pulse... -
Page 19: Setting The Transmission Rate
I/O LED goes off after an error-free startup without the green I/O LED having to light up. The green I/O LED does not light up until data exchange is begun via the Beckhoff-Lightbus. Setting the Transmission Rate Setting... -
Page 20: Setting The Station Address
Basic information Setting the Station Address DIP switchh In the BK7500 the station address must be set at the coupler's DIP switch. Example DIP-Bit 1-8 1 + 0 + 0 + 8 + 0 + 0 + 64 + 128 = BK7500... -
Page 21: Sercos Interface Coupler Bk7500
It is also possible to have device configurations that only handle either input or output information. Typical Beckhoff Terminals binary inputs/outputs for 24V or 230V, analog inputs, analog outputs, counters, incremental encoders etc. The quantity of input and output information is device-dependent, and is limited in the BK7500 to 32 bytes of input data and 32 bytes of output data. - Page 22 SERCOS interface Coupler BK7500 Name Type Attributes Default value P-0-0001 I/O analog terminals Uint 16 Read/Write none Meaning This parameter allows a table to be selected in the Bus Coupler. See also the section on the register structure. It can also be selected in the MDT. Name Type Attributes Default value...
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Page 23: The I/O Data Channel
SERCOS interface Coupler BK7500 The I/O Data Channel Function Set and actual values are exchanged between the controller and the BK7500 via the I/O data channels. Set and actual values may be exchanged either cyclically or non-cyclically. The controller needs the I/O data base in order to address the I/O data channel. - Page 24 SERCOS interface Coupler BK7500 Name Type Attributes Default Function value S-2-0001 Channel type Variable Read/Write I/O data channel + 0001 Meaning The channel type describes the type of the terminal. This also depends on the IDN P-0-0001 (see Table xxx). KL1xxx (strict) 0x0001 16 bit data (without KL1501) KL1xxx (compact)
- Page 25 SERCOS interface Coupler BK7500 Name Type Attrib Default Function utes value S-0-0096 Slave identification Uint 16 Read Meaning Shows the station's SERCOS address. Name Type Attrib Default Function utes value S-0-0135 "Drive" status Uint 16 Read 0xXXXX Meaning Shows the status of the BK7500 in the operating data via the service channel.
- Page 26 SERCOS interface Coupler BK7500 Name Type Attrib Default Function utes value S-0-0290 Device type Read Meaning Shows the device type (drive, I/O, mixed station) in the operating data Bit 0,1 0 0 = drive 1 0 = I/O station 0 1 = mixed station 1 1 = reserved Bit 15 0 = device specified by the SERCOS working circle...
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Page 27: The Transfer Medium: Plugs And Cables
SERCOS interface Coupler BK7500 The transfer medium: plugs and cables BK7500 Sercos Coupler Fiber optic conductor: the SERCOS User group elaborated the specification of a transmission technology based on fiber optic conductors for applications in highly interference-prone environments and also to increase the range. -
Page 28: Appendix
Appendix Appendix Example: composition of a process image in the Bus Coupler The hardware configuration: Bk7500 KL1104 KL2114 KL3062 KL4002 KL9010 Plug the terminals into the coupler in the sequence that can be seen in the picture, and set address 2 at the "station address" DIP switch. Connect the 24V /0V and the +/- contacts to the 24V DC supply voltage, and switch the supply voltage on. -
Page 29: Configuration Of The Sercos Master
Appendix Configuration of the SERCOS master Configuration of the AT S-2-0000 Chn 1 Data (Terminal KL3062) UINT 16 S-2-0005 Chn 1 Status (Terminal Kl3062) UINT 16 S-2-0010 Chn 2 Data (Terminal KL3062) UINT 16 S-2-0015 Chn 2 Status (Terminal Kl3062) UINT 16 S-2-0040 Chn 1-16 Data (All digital Input) - Page 30 Appendix Base settings P-0-0001 Strict/Compact Mode (0/1) UINT 16 (0x0000) := strict >> each clamp channel gets its own I/O channel S-0-0291 I/O Base UINT 16 (0x1000) := Pointer on the IDN S-1-0000 S-1-0000 Database UINT 16 (0x2000) := Pointer to the first I/O Channel >>> see S- 2-0000 Chn 1 Data (Terminal KL3062 BK7500...
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Page 31: Index
3, 11 Data consistency Plugs Diagnostic LEDs Power contacts DIP switch Power supply End terminal Starting operation Example If you have suggestions to make or ideas about our documentation, please send us an e-mail, stating the version number, at Dokumentation@Beckhoff.de. BK7500... -
Page 32: Support And Service
Please contact your Beckhoff branch office or representative for local support and service on Beckhoff products! The addresses of Beckhoff's branch offices and representatives round the world can be found on her internet pages: http://www.beckhoff.com You will also find further documentation for Beckhoff components there.