Documentation for
KL2502, KL2512
2-Channel Pulse Width Output Terminals, 24 V
Version: 3.0
DC
Date: 2008-02-12
Table of contents
Table of contents
1 Foreword 1
1.1 Notes on the documentation 1
1.1.1 Liability Conditions 1
1.1.2 Delivery conditions 1
1.1.3 Copyright 1
1.2 Safety Instructions 2
1.2.1 State at Delivery 2
1.2.2 Description of safety symbols 2
2 Product overview 3
2.1 Introduction 3
2.2 Technical data 5
2.3 Description of functions 6
2.4 Operating modes 6
3 Terminal configuration 8
3.1 Register overview 8
3.2 Register description 9
3.2.1 General register description 9
3.2.2 Terminal-specific register description 12
3.3 Register communication 14
3.4 Mapping in the bus coupler 16
3.4.1 Examples 17
4 Annex 19
4.1 Support and Service 19
4.1.1 Beckhoff's branch offices and representatives 19
4.1.2 Beckhoff Headquarters 19
KL2502, KL2512
Foreword
1 Foreword
1.1 Notes on the documentation
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 following notes and
explanations are followed when installing and commissioning these components.
1.1.1 Liability Conditions
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.
The documentation has been prepared with care. The products described are, however, constantly under
development. For that reason the documentation is not in every case checked for consistency with
performance data, standards or other characteristics. None of the statements of this manual represents a
guarantee (Garantie) in the meaning of § 443 BGB of the German Civil Code or a statement about the
contractually expected fitness for a particular purpose in the meaning of § 434 par. 1 sentence 1 BGB. In
the event that it contains technical or editorial errors, we retain the right to make alterations at any time
and without warning. 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.
1.1.2 Delivery conditions
In addition, the general delivery conditions of the company Beckhoff Automation GmbH apply.
1.1.3 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.
KL2502, KL2512 1
Foreword
1.2 Safety Instructions
1.2.1 State at Delivery
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.
1.2.2 Description of safety symbols
The following safety symbols are used in this documentation. They are intended to alert the reader to the
associated safety instructions..
This symbol is intended to highlight risks for the life or health of personnel.
Danger
This symbol is intended to highlight risks for equipment, materials or the
Attention
i
Note
environment.
This symbol indicates information that contributes to better understanding.
2 KL2502, KL2512
Product overview
2 Product overview
2.1 Introduction
KL2502 - 2-channel pulse width output terminal 24 V
, switching to high potential
DC
The KL2502 output terminal modulates the pulse width of a binary signal, and outputs it electrically
isolated from the K-bus. The mark/space ratio is prescribed by a 16 bit value from the automation unit.
The output stage is protected against overload and short-circuit. The Bus Terminal contains two channels
that indicate their signal state by means of light emitting diodes. The LEDs are driven in time with the
outputs, and show the mark/space ratio by their brightness.
KL2502, KL2512 3
Product overview
KL2512 - 2-channel pulse width output terminal, 24 VDC, switching to negative potential
The KL2512 Bus Terminal enables direct connection of different ohmic loads. The output signal is a
pulse-width modulated voltage. The typical load of an LED group or an incandescent lamp is connected
between the positive side of the supply voltage and the output of the KL2512. Via the fieldbus the output
can be set independently for two channels with a resolution of more than 30,000 steps. The PWM
frequency can be changed. The power transistors switch the ground connection and are galvanically
isolated from the internal K-bus.
4 KL2502, KL2512
Product overview
2.2 Technical data
Technical data KL2502 KL2512
Max. output current (per channel)
Current consumption from K-Bus
Bit width in the process image
Permissible ambient
temperature range
Vibration/Shock resistance
EMC resistance Burst / ESD
Number of outputs
Rated load voltage
switched potential
Load type
Fundamental frequency
Keying ratio 0 ... 100%
Resolution
Electrical isolation
Leakage current
Configuration no address settings, configurations via bus coupler or control
Weight approx.
during operation
during storage
Relative humidity
Installation position
Type of protection
2
24 VDC (20 V ... 29 V)
24 V 0 V
resistive, inductive resistive
0.1 A (short-circuit-proof) 1,0 A
1 ... 20 kHz, 250 Hz default
0 ... 100%
(Ton > 750 ns, T
>500 ns)
off
max. 10 bits
500 V
(K-Bus / field voltage)
rms
18 mA typ.
10 mA typ.
48 I/O: 2 x 16 bits data, 2 x 8 bits control/status
system
50 g
0°C ... +55°C
-25°C ... +85°C
95%, no condensation
conforms to EN 60068-2-6 / EN 60068-2-27, EN 60068-2-29
conforms to EN 61000-6-2 / EN 61000-6-4
any
IP20
KL2502, KL2512 5
Product overview
2.3 Description of functions
The output terminal KL2502 modulates the pulse width of a binary signal.
The peripheral end of the electronic circuitry is electrically isolated from the
internal K bus and therefore also from the field bus. The clock pulse (base
frequency) and the pause ratio are adjustable. Via the control system’s
process image, 16-bit values can be specified for setting.
By default, the terminal KL2502 occupies 6 bytes in the process image.
Mapping of the KL2502 is adjustable via the control system or via the bus
coupler’s configuration interface using the Beckhoff KS2000 configuration
software.
Besides operation in the PWM mode, the KL2502 can also be operated in
the FM mode (frequency modulation) or in the stepper motor control mode
(Frq-Cnt-Pulse mode).
The terminal’s default setting is the PWM mode with a base frequency of
250 Hz and a resolution of 10 bits.
LED display RUN LEDs
On: normal operation
Off: watchdog timer overflow has occurred. If no process data is transferred
by the bus coupler for 100 ms, the green LED goes off and the outputs are
set to 0% duty cycle.
Process data Input format:
KL2502: 2‘s complement representation (integer -1 corresponds to 0xFFFF)
The duty cycle/period ratio is specified with a maximum resolution of 10 bits.
KL2512: 16 bit unsigned Integer
process data
output value
0% duty cycle
50% duty cycle
100% duty cycle
KL2502 KL2512*
0x0000 (0
0x3FFF (16383
0x7FFF (32767
) 0x7FFF (32767
dez
) 0x3FFF (16383
dez
) 0x0000 (0
dez
) 0xFFFF (65535
dez
) 0xBFFF (49151
dez
) 0x8000 (32768
dez
dez
dez
dez
)
)
)
*) The KL2512 runs twice trough the output range (0...100% duty cycle).
2.4 Operating modes
The operating mode of the terminal is set via the feature register R32.
PWM mode In the PWMx modes, two channels can be operated. Attention must be paid
to the fact that the operating mode and the period are identical for both
channels.
Duty-Cycle
Period
t
6 KL2502, KL2512
Product overview
PWMH In the PWM mode, the ratio of the duty cycle to the period is specified via
the process data.
In doing so, 100% duty cycle corresponds to the process data item
0x7FFF. During operation, the period can be specified via the register R2.
This is loaded out of R35 (SEEROM) after a system start and is entered in
R2.
The frequency range is from 245 Hz to 20 kHz (0xFA0 in R2 corresponds
to 250 Hz) with a resolution of 10 bits at 245 Hz, 976 Hz and 3.9 kHz.
PWML In the PWM mode, the ratio of the duty cycle to the period is specified via
the process data.
In doing so, 100% duty cycle corresponds to the process data item 0x7FFF
(32767). During operation, the period can be specified via the register R2.
After a system start, this is loaded out of R35 (SEEROM) and is entered in
R2.
The frequency range is from 2 Hz to 250 Hz (250 Hz corresponds to
0x01F4 in R2).
Frq-Cnt-PWM mode Via the process output data of the control system, the frequency is
specified as 2 Hz per digit. The number of periods output by the terminal is
returned to the control system as process input data. In this operating
mode, the counting direction is defined by the sign of the output data. Here,
2 Hz corresponds to the value 0x0001 and -2Hz corresponds to the value
0xFFFF (signed integer). The frequency ranges from 2 Hz to 2 kHz. The
pulses are output in channel O1 and the counting direction is output in
channel O2. "Down" corresponds to the GND level and "up" corresponds to
the Vcc (24V) level.
The counter is set to the value of the output data with a rising edge of the
control bits 0 (control byte in the process data mode, i.e. bit7 = 0).
The pulse width ratio is defined via R36.
Frq-Cnt pulse mode The frequency is specified as 2 Hz per digit via the process output data of
the control system. The number of pulses output by the terminal is returned
to the control system as process input data. In this operating mode, the
counting direction is defined via the sign of the output data. Here, 2 Hz
corresponds to the value 0x0001 and -2Hz corresponds to the value
0xFFFF (signed integer).
The pulses are output in channel O1 and the counting direction is output in
channel O2. "Down" corresponds to the GND level and "up" corresponds to
the Vcc level.
The frequency range is from 2 Hz to 2 KHz.
The counter is set to the value of the output data with a rising edge of the
control bit0 (control byte in the process data mode, i.e. bit7 = 0)..
The fixed pulse width for all frequencies is defined via R37.
Cnt-Cnt-PWM mode The number of pulses is specified via the process output data. The number
of output periods is returned to the control system as process input data. At
the same time, the pulse width ratio is defined via R36 and the period is
defined via R35. Output is started with a positive edge of control bit 0.
Output can be retriggered with each further edge. The pulses are output in
channel O1, Channel O2 can be started via control bit 2. Acceptance and
simultaneous starting of pulse output is returned as status information to
the control system in status bit0. Status bit1 remains for as long as output
is active and status bit 2 returns the status of channel 1.
KL2502, KL2512 7
Terminal configuration
3 Terminal configuration
Register set for each channel:
Address Description Default R/W Storage medium
R0
reserved 0x0000 R
R1
reserved 0x0000 R
R2
Period variable R RAM
R3
Fundamental frequency variable R RAM
R4
reserved 0x0000 R
R5
Raw PWM value variable R RAM
R6
Diagnostic register - not used 0x0000 R
R7
Command register - not used 0x0000 R
R8
Terminal type 2502/2512 R ROM
R9
Firmware version number 0x???? R ROM
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R20
R21
R30
R31
R32
R33
R34
R35
R36
R37
R38
R63
Multiplex shift register 0x0218/0130 R ROM
Signal channels 0x0218 R ROM
Minimum data length 0x1818 R ROM
Data structure 0x0000 R ROM
reserved 0x0000 R
Alignment register variable R/W RAM
Hardware version number 0x???? R/W SEEROM
reserved specific R/W SEEROM
reserved specific R/W SEEROM
Manufacturer scaling: offset 0x0000 R/W SEEROM
Manufacturer scaling: gain 0x0020 R/W SEEROM
reserved 0x0000 R/W SEEROM
...
... ... ... ...
reserved 0x0000 R/W SEEROM
Code word register variable R/W RAM
Feature register 0x0004 R/W SEEROM
User offset 0x0000 R/W SEEROM
User gain 0x0100 R/W SEEROM
Period PWM 0x0000 R/W SEEROM
Duty-Cycle 0x0000 R/W SEEROM
Pulse-Radiation 0x0000 R/W SEEROM
reserved 0x0000 R/W SEEROM
...
... ... ... ...
reserved 0x0000 R/W SEEROM
3.1 Register overview
The terminal can be configured and parameterized by way of the internal
register structure.
8 KL2502, KL2512
Terminal configuration
3.2 Register description
The complex terminals can be adjusted to different operating modes or
functionalities. The " general description of register " describes the
contents of the registers, which are identical for all complex terminals.
The terminal-specific registers are explained in the section following to it.
The access to the internal registers of the terminal is described in the
section "register communication".
3.2.1 General register description
Complex terminals that possess a processor are capable of bidirectionally
ex-changing data with the higher-level control system. Below, these
terminals are referred to as intelligent bus terminals. They include the
analog inputs (0-10V, -10-10V, 0-20mA, 4-20mA), the analog outputs (010V, -10-10V, 0-20mA, 4-20mA), serial interface terminals (RS485, RS232,
TTY, data transfer terminals), counter terminals, encoder interfaces, SSI
interfaces, PWM terminals and all other parameterizable terminals.
Internally, all intelligent terminals possess a data structure that is identical
in terms of it's essential characteristics. This data area is organized in
words and embraces 64 memory locations. The essential data and
parameters of the terminal can be read and adjusted by way of the
structure. Function calls with corresponding parameters are also possible.
Each logical channel of an intelligent terminal has such a structure
(therefore, 4-channel analog terminals have 4 register sets.
This structure is broken down into the following areas:
(You will find a list of all registers at the end of this documentation).
Area Address
Process variables
Type registers
Manufacturer parameters
User parameters
Extended user area
0...7
8...15
16...30
31...47
48...63
Process variables
3.2.1.1 R0 to R7: Registers in the terminal’s internal RAM
The process variables can be used in additional to the actual process
image and their functions are specific to the terminal.
3.2.1.2 R0 toR5: Terminal specific registers
These registers have a function that depends on the terminal type.
R6: Diagnostic register
The diagnostic register may contain additional diagnostic information. In
the case of serial interface terminals, for example, parity errors that have
occurred during data transfer are indicated.
R7: Command register
High-Byte_Write = function parameter
Low-Byte _Write = function number
High-Byte _Read = function result
Low-Byte_ Read = function number
KL2502, KL2512 9
Terminal configuration
Type registers
3.2.1.3 R8 to R15 Registers in the terminal’s internal ROM
The type and system parameters are programmed permanently by the
manufacturer and can only be read by the user but cannot be modified.
R8: Terminal type
The terminal type in register R8 is needed to identify the terminal.
R9: Firmware version X.y
The firmware version can be read as an ASCII character string.
R10: Data length
R10 contains the number of multiplexed shift registers and their length in
bits.
The bus coupler sees this structure.
R11: Signal channels
In comparison with R10, the number of logically existing channels is
located here. For example, one physically existing shift register may
consist of several signal channels.
R12: Minimum data length
The respective byte contains the minimum data length of a channel to be
transferred. If the MSB is set, then the control/status byte is not necessarily
needed for the function of the terminal and, with appropriate configuration
of the coupler, is not transferred to the control system.
R13: Data type register
Data type register
3.2.1.4 R14: not used
3.2.1.5 R15: Alignment bits (RAM)
The analog terminal is set to a byte limit in the terminal bus with the
alignment bits.
Manufacturer parameters
3.2.1.6 R16 - R30 is the area of the manufacturer parameters
(SEEROM)
The manufacturer parameters are specific to each terminal type. They are
programmed by the manufacturer but can also be modified from the control
system. The manufacturer parameters are stored permanently in a serial
EEPROM and are therefore not destroyed by power failures.
These registers can only be modified after setting a code word in R31.
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x11
0x12 1 byte n bytes structure with a variable logical channel
0x13
0x14 1 byte n words structure with a variable logical channel
0x15
0x16 1 byte n double words structure with a variable logical
Terminal without valid data type
Byte array
1 byte n bytes structure
Word array
1 byte n words structure
Double word array
1 byte n double words structure
1 byte 1 double word structure
1 byte 1 double word structure
Byte-array with a variable logical channel length
length (eg 60xx)
Word-array with a variable logical channel length
length
Double word array with a variable logical channel length
channel length
10 KL2502, KL2512
Terminal configuration
User parameters
i
Note
Extended application area
3.2.1.7 R31 to R47 "Application parameters" area (SEEROM)
The application parameters are specific to each terminal type. They can be
modified by the programmer. The application parameters are stored
permanently in a serial EEPROM in the terminal and cannot be destroyed
by power failures. The user area is write protected over a Codeword.
R31: Code word register in the RAM
The code word 0x1235 must be entered here to enable modification of
parameters in the user area. Write-protection is set if a different value is
entered in this register. When write protection is inactive, the code word is
returned during reading of the register. The register contains the value zero
when write protection is active.
R32: Feature register
This register defines the operating modes of the terminal. For example, a
user-specific scaling can be activated for the analog I/O’s.
3.2.1.8 R33 to R47
Registers that depend on the terminal type
3.2.1.9 R47 to R63
These registers have not yet been implemented.
KL2502, KL2512 11
Terminal configuration
3.2.2 Terminal-specific register description
Process variables
R0, R1: no function
3.2.2.1 R2: Period
In the PWM mode, the period for current operation can be specified here.
Following a power on reset, the period is taken from R35.
PWMH mode, Cnt-Cnt PWM mode:
1 digit corresponds to one 1 microsecond here
e.g.: 250 Hz => 4000 µs = 0xFA0
4 KHz => 250 µs = 0xFA
PWML mode, Frq-Cnt PWM mode, Frq-Cnt pulse mode:
1 digit corresponds to 8 microseconds
e.g.: 2 Hz => 500 ms = 0xF424
200Hz => 5 ms = 0x271
R3: Base frequency
In the PWM mode, the base frequency can be specified here. [R/W]
1 digit corresponds to 1 Hz
R5: PWM raw vale
The value of the processor’s PWM unit is stored in this register. The
maximum resolution for a given frequency can be computed with this
value.
R6: Diagnostic register
Not used
Manufacturer parameters
R19: Manufacturer offset B_h
16-bit signed integer
Linear equation: Y = A_h X + B_h
This register contains the offset of the manufacturer’s linear equation. The
linear equation is activated via R32.
R20: Manufacturer scaling A_h
16-bit unsigned integer * 2
This register contains the scaling value of the manufacturer‘s linear
equation. The linear equation is activated via R32.
1 corresponds to the register value 0x0100
-8
12 KL2502, KL2512
Terminal configuration
Application parameters
R32: Feature register
[0x0004]
The feature register defines the terminal’s operating mode.
Feature bit No. Description of the mode
Bit 0
Bit 1
Bit 2
Bit 12-3
Bit15,Bit14,Bit13
1 User scaling active [0]
1 Manufacturer scaling active [0]
1
0 reserved, don't change!
Mode Value range
000 PWMH mode [000] 250 Hz to 20 kHz
001 PWML mode 2 Hz to 250 Hz
011 Frq-Cnt PWM mode 2 Hz to 2 kHz
101 Frq-Cnt pulse mode 2 Hz to 2 kHz
111 Cnt-Cnt PWM mode 250 Hz to 8 kHz
Watchdog timer active. If the terminal does
not receive any data for 100 ms, the PWM
signal is set to 0% duty cycle. [1]
R33: User offset B_w
16-bit signed integer
Linear equation: Y = A_w X + B_w
This register contains the offset of the user linear equation. The linear
equation is activated via R32.
R34: User scaling A_w
16-bit signed Integer * 2
-8
This register contains the scaling factor of the user linear equation. The
linear equation is activated via R32.
R35: Period for PWM mode
[0x0FA0]
Subsequent to a restart of the processor, the period of R35 is entered in
R2.
During operation, this can be modified via R2 or R3.
Input is as described in R2.
R36: Duty cycle
[0x4000]
The ratio of the duty cycle to the period in the Frq-Cnt-PWM mode and in
the Cnt-Cnt-PWM mode is defined by this register.
0x2000 corresponds to 25% duty cycle
0x4000 corresponds to 50% duty cycle
R37: Pulse duration for the Frq-Cnt pulse mode
[0x0005]
The pulse duration in the Frq-Cnt pulse mode is entered in this register.
1 digit corresponds to 8 microseconds.
KL2502, KL2512 13
Terminal configuration
3.3 Register communication
Register access via
process data transfer
Bit 7=1: register mode
When bit 7 of the control byte is set, the first two bytes of the user data are
not used for process data transfer, but are written into or read out of the
terminal’s register.
Bit 6=0: read
Bit 6=1: write
In bit 6 of the control byte, you define whether a register is to be read or
written. When bit 6 is not set, a register is read without modification. The
value can be taken from the input process image.
When bit 6 is set, the user data is written into a register. The operation is
concluded as soon as the status byte in the input process image has
supplied an acknowledgement (see examples).
Bits 0 to 5: address The address of the register to be addressed is entered in bits 0 to 5 of the
control byte.
Control byte in the
register mode
Bit 7 6 5 4 3 2 1 0
Name REG=1 W/R A5 A4 A3 A2 A1 A0
REG = 0: Process data transfer
REG = 1: Access to register structure
W/R = 0: Read register
W/R = 1: Write register
A5...A0 = Register address
A total of 64 registers can be addressed with the addresses A5...A0.
To the bus coupler
K-Bus
Control-/
status byte
C/S-bit 7
If control bit 6=0: read
If control bit 6=1: write
Complex bus terminal
The control or status byte occupies the lowest address of a logical channel.
The corresponding register values are located in the following 2 data bytes
(the BK2000 is an exception to the rule: here, an unused data byte is
inserted after the control or status byte, thus setting the register value to a
word limit).
User data
2 or mors bytes
H
L
If control bit 7=0: input/output
If control bit 7=1:
registerconfiguration
If control bit 7=1:
adress in the control bit 0-5
Term i nal ´s
register set
64 words
63
0
H
L
14 KL2502, KL2512
Terminal configuration
Example 1
Reading register 8 in the BK2000 with a KL3022 and the end terminal.
If the following bytes are transferred from the controller to the terminal,
Byte
Name
Value
Byte3 Byte2 Byte1 Byte0
DataOUT, low byte DataOUT, high byte Not used Control Byte
0xXX 0xXX 0xXX 0x88
the terminal returns the following type designation (0x0BCE corresponds to
the unsigned integer 3022).
Byte
Name
Value
Byte3 Byte2 Byte1 Byte0
DataIN, low byte DataIN, high byte Not used Status Byte
0xCE 0x0B 0x00 0x88
Example 2
Writing register 31 in the BK2000 with an intelligent terminal and the end
terminal.
If the following bytes (user code word) are transferred from the controller to
the terminal,
Byte
Name
Value
Byte3 Byte2 Byte1 Byte0
DataOUT, low byte DataOUT, high byte Not used Control Byte
0x35 0x12 0xXX 0xDF
the user code word is set and the terminal returns the register address with
the bit 7 for register access and the acknowledgement.
Byte
Name
Value
Byte3 Byte2 Byte1 Byte0
DataIN, low byte DataIN, high byte Not used Status Byte
0x00 0x00 0x00 0x9F
KL2502, KL2512 15
Terminal configuration
3.4 Mapping in the bus coupler
As already described in the chapter terminal configuration, each bus
terminal is mapped in the bus coupler. In the standard case, this mapping
is done with the default setting in the bus coupler / bus terminal. This
default setting can be modified with the Beckhoff KS2000 configuration
software or using master configuration software (e.g. ComProfibus or
TwinCAT System Manager). The following tables provide information on
how the KL2502 maps itself in the bus coupler depending on the set
parameters.
Mapping in the bus coupler The KL2502 is mapped in the bus coupler with 6 bytes input and 6 bytes
output data.
Default mapping for
CANopen, CANCAL,
DeviceNet, ControlNet,
Modbus, RS232 und
RS485 Couplers
Conditions Word offset High byte Low byte
Complete evaluation: any 0 Ch1 D0 Ch1 CB/SB
Motorola format: no 1 Ch2 CB/SB Ch1 D1
Word alignment: no 2 Ch2 D1 Ch2 D0
3 - -
Default mapping for
Profibus and Interbus
Couplers
Conditions Word offset High byte Low byte
Complete evaluation: any 0 Ch1 D1 Ch1 CB/SB
Motorola format: yes 1 Ch2 CB/SB Ch1 D0
Word alignment: no 2 Ch2 D0 Ch2 D1
3 - -
Default mapping for
Lightbus, EtherCAT and
Ethernet Couplers and Bus
Terminal Controllers
(BCxxxx, BXxxxx)
Conditions Word offset High byte Low byte
Complete evaluation: any 0 res. Ch1 CB/SB
Motorola format: no 1 Ch1 D1 Ch1 D0
Word alignment: yes 2 res. Ch2 CB/SB
3 Ch2 D1 Ch2 D0
Conditions Word offset High byte Low byte
Complete evaluation: any 0 res. Ch1 CB/SB
Motorola format: yes 1 Ch1 D0 Ch1 D1
Word alignment: yes 2 res. Ch2 CB/SB
3 Ch2 D0 Ch2 D1
Key Complete evaluation:
The terminal is mapped with control and status byte.
Motorola format:
Motorola or Intel format can be set.
Word alignment:
The terminal is at word limit in the Bus Coupler.
Ch n SB: status byte for channel n (appears in the input process image).
Ch n CB: control byte for channel n (appears in the output process image).
Ch n D0: channel n, data byte 0 (byte with the lowest value)
Ch n D1: channel n, data byte 1 (byte with the highest value)
"-": This byte is not used or occupied by the terminal.
res.: reserved:
This byte occupies process data memory, although it is not used.
16 KL2502, KL2512
Terminal configuration
Each terminal channel is mapped in the bus coupler. The terminal’s data is
Lightbus Coupler BK2000 In the case of the Lightbus Coupler BK2000, the control /status byte is
3.4.1 Examples
mapped differently in the bus coupler’s memory depending on the type of
the bus coupler and on the set mapping configuration (e.g. Motorola / Intel
format, word alignment,...). Contrary to the analog input and output
terminals, in the case of the KL2502 the control and status byte is always
also mapped regardless of the field bus system used.
always mapped besides the data bytes. It is always in the low byte at the
offset address of the terminal channel.
Beckhoff-Lightbus
bus coupler
BK2000
The terminal is
mapped in the
bus coupler.
C/ S
Data H Data L
C/ S
Data LData H
C/ S
D1 - 1
D1 - 0
0 Offset Terminal1 Channel1 = 0
D0 - 1
C/ S - 1
D0 - 0
C/ S - 0
Offset Terminal2 Channel2 = 8
User data allocation depending
on mapping
Offset Terminal2 Channel1 = 4
KL2502
LH
K- Bus
To the bus terminal
Profibus Coupler BK3000 In the case of the Profibus coupler BK3000, by default the KL2502 is
mapped with 6 bytes of input data and 6 bytes of output data (3 bytes per
channel). Therefore, 2 bytes of user information data and 1 control/status
byte are mapped for each channel.
Profibus bus coupler
BK3000
The terminal is
mapped in the
bus coupler.
Data L
Data H
C/ S
D0 - 1
D1 - 1
C/ S - 1
D0 - 0
D1 - 0
C/ S - 0
0
The control-/status byte
must be inserted for
parameterization.
Offset Terminal2 Channel1 = 6
KL 2502 Channel 2
Offset Terminal1 Channel2 = 3
KL 2502 Channel1
Offset Terminal1 Channel1 = 0
K- Bus
To the bus terminal
KL2502, KL2512 17
Terminal configuration
Interbus Coupler BK4000 By default, the Interbus coupler BK4000 maps the KL2502 with 6 bytes of
input and 6 bytes of output data. Parameterization via the field bus is not
possible. The KS2000 software is needed for configuration if it is intended
to use the control / status byte.
Interbus bus coupler
BK4000
The terminal is
mapped in the
bus coupler.
Data H
Data L
Data H
D0 - 1
D1 - 1
C/ S - 1
D0 - 0
D1 - 0
C/ S - 0
0
The control-/status byte
must be inserted for
parameterization (KS2000).
Offset Terminal2 Channel1 = 6
KL 2502 Channel 2
Offset Terminal1 Channel2 = 3
KL 2502 Channel1
Offset Terminal1 Channel1 = 0
Other bus couplers and
further information
i
Note
Parameterization with
KS2000
K- Bus
To the bus terminal
You will find further information on the mapping configuration of bus
couplers in the the respective bus coupler manual under the heading of
"Configuration of Masters".
The annex contains an overview of the possible mapping configurations
depending on the adjustable parameters.
Parameterization operations can be carried out independently of the field
bus system using the Beckhoff KS2000 configuration software via the
serial configuration interface in the bus coupler.
18 KL2502, KL2512
Annex
4 Annex
4.1 Support and Service
Beckhoff and their partners around the world offer comprehensive support and service, making available
fast and competent assistance with all questions related to Beckhoff products and system solutions.
4.1.1 Beckhoff's branch offices and representatives
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.
4.1.2 Beckhoff Headquarters
Beckhoff Automation GmbH
Eiserstr. 5
33415 Verl
Germany
phone: + 49 (0) 5246/963-0
fax: + 49 (0) 5246/963-198
e-mail: info@beckhoff.com
web: www.beckhoff.com
Beckhoff Support
Support offers you comprehensive technical assistance, helping you no only with the application of
individual Beckhoff products, but also with other, wide-ranging services:
• support
• design, programming and commissioning of complex automation systems
• and extensive training program for Beckhoff system components
hotline: + 49 (0) 5246/963-157
fax: + 49 (0) 5246/963-9157
e-mail: support@beckhoff.com
Beckhoff Service
The Beckhoff Service Center supports you in all matters of after-sales service:
• on-site service
• repair service
• spare parts service
• hotline service
hotline: + 49 (0) 5246/963-460
fax: + 49 (0) 5246/963-479
e-mail: service@beckhoff.com
KL2502, KL2512 19
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