KL4112
2-Channel Analog Output Terminal 0...20 mA
Configuration Instructions
Version 2.1
2006-10-23
Contents
Contents
1. Foreword 3
Notes on the documentation 3
Safety Instructions 4
2. Technical data 5
3. Description of functions 6
4. Terminal configuration 7
5. Register description 8
General register description 8
Terminal-specific register description 11
Control/Status byte 12
Register communication KL4112 12
6. Annex 15
Mapping in the bus coupler 15
Table of the register 17
7. Support and Service 18
Beckhoff Headquarters 18
2 KL4112
Foreword
Foreword
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.
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.
Delivery conditions
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.
KL4112
3
Foreword
i
Safety Instructions
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.
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 environ-
Attention
ment.
This symbol indicates information that contributes to better understanding.
Note
4 KL4112
Technical data
13
14
RUN - LED1
A
B
C
D
O1
O2
RUN - LED2
Technical data
+O1
Power
Contacts
1
2
3
4
+ +
S
5
6
7
S
8
Shield
Top View Contact Assembly
Technical data KL4112
Number of outputs
Power supply
Signal voltage
Accuracy
Resolution
Conversion time
Electrical isolation
Current consumption from K-Bus
Bit width in the process image
Configuration
Weight approx.
Operating temperature
Storage temperature
Relative humidity
Vibration/shock resistance
EMC resistance Burst / ESD
Installation position
Type of protection
Load
+O2
+24 V
0 V
Shield
2
24 V DC via the Power contacts
0 ... 20 mA
< 500 Ω
< ± 0.1% (of the upper range value)
15 bits, configurable 16 bits
app. 3.5 ms
500 Vrms (K-Bus / signal voltage)
60 mA typ.
O: 2 x 16 bits data (2 x 8 bits control/status optional)
no address or configuration setting
80 g
0°C ... +55°C
-25°C ... +85°C
95%, no condensation
conforms to IEC 68-2-6 / IEC 68-2-27
conforms to EN 50082 (ESD, Burst) / EN 50081
any
IP20
+ O1 +O2
+24V
0V
Shield
Connection
KL4112
5
Description of functions
The process data arriving from the bus coupler is output to the process as
Input format of
process data
LED Display
Process data
Description of functions
The analog output terminal KL4112 generates output signals within the
range from 0 – 20 mA. The output current is output by the terminal with up
to 16-bit resolution. The output current is electrically isolated from the terminal bus level.
In the default setting, process data is entered in twos complement (integer
-1 corresponds to 0xFFFF).
Process data item (Hex/decimal) Output value
The two RUN LEDs indicate the operating state of the affiliated terminal
channel.
RUN LED:
On – normal operation
Off – watchdog-timer overflow has occurred. The green LEDs go off if no
process data is transferred by the bus coupler for 100 ms. The output outputs a current that is configurable by the user (see feature register).
follows.
X = Process data of the PLC
B_a,A_a = Manufacturer scaling (R17,R28)
B_h,A_h = Manufacturer scaling (R19,R20)
B_w,A_w = User scaling (R33,R34)
Y_dac = Output value to the DA converter
Neither user nor manufacturer scaling active:
Y_0 = B_a + A_a*X (1.0)
Y_dac = X
Manufacturer scaling active:
Y_1 = B_h + A_h * Y_0 (1.1)
Y_dac=Y_1
User scaling active:
Y_2 = B_w + A_w * Y_0 (1.2)
Y_dac=Y_2
Manufacturer and user scaling active:
Y_1 = B_h + A_h * Y_0 (1.3)
Y_dac = B_w + A_w * Y_1 (1.4)
The straight-line equations are activated via R32.
0x0000 (0)
0x3FFF (16383)
0x7FFF (32767)
0 mA
10 mA
20 mA
6 KL4112
Offset Terminal1 Channel1 = 0
Offset Terminal2 Channel1 = 4
Offset Terminal2 Channel2 = 8
User data allocation depending
To the bus terminal
Offset Terminal1 Channel1 = 0
Offset Terminal1 Channel2 = 3
Offset Terminal2 Channel1 = 6
To the bus terminal
Terminal configuration
Beckhoff Lightbus
Coupler BK2000
The terminal can be configured and parametrized by way of the internal
register structure.
Each terminal channel is mapped in the bus coupler. The terminal’s data is
mapped differently in the bus coupler’s memory depending on the type of
the bus coupler and on the set mapping configuration (eg.Motorola / Intel
format, word alignment,...). For parametrization of a terminal, the control/status byte must also be mapped.
In the case of the Beckhoff-Lightbus coupler BK2000, the control /status
byte is 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.
Terminal configuration
C/S
Data H Data L
C/S
Data LData H
C/S
D1 - 1
D1 - 0
0
D0 - 1
C/S - 1
D0 - 0
C/S - 0
on mapping
KL4112
Profibus Coupler BK3000
LH
K-Bus
In the case of the Profibus coupler BK3000, for which terminal channels
the control /status byte is also to be inserted must be defined in the master
configuration .If the control /status byte is not evaluated, the KL4112 occupies 4 bytes of output data (2 bytes of user data per 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
parametrization.
KL4112 Channel 2
KL4112 Channel1
KL4112
K-Bus
7
Register description
Offset Terminal1 Channel1 = 0
Offset Terminal2 Channel1 = 4
Offset Terminal1 Channel2 = 2
Offset Terminal2 Channel1 = 6
To the bus terminal
i
Interbus Coupler BK4000
By default, the Interbus coupler BK4000 maps the KL4112 with 4 bytes of
output data (2 bytes of user data per channel). Parametrization 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.
The control/status byte
must be inserted for
Data H
Data L
Data H
Data L
Data H
D0 - 1
D1 - 1
D0 - 0
D1 - 0
0
parameterization (KS2000).
K-Bus
Other bus couplers and
further information
Note
Parametrization with
the KS2000 software
You will find further information on the mapping configuration of bus couplers in the annex of 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.
Parametrization 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.
Register description
8 KL4112
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 sec-
tion " register communication ".
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 (0-10V, -1010V, 0-20mA, 4-20mA), serial interface terminals (RS485, RS232, TTY,
data transfer terminals), counter terminals, encoder interfaces, SSI interfaces, PWM terminals and all other parametrizable 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
Register description
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, 4channel 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 R0 - 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.
R0 - R5: 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
Type registers R8 - R15 Registers in the terminal’s internal ROM der Klemme
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: Software version X.y
The software 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.
KL4112
9
Register description
i
R13: Data type register
Data type register
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x11
0x12
0x13
0x14
0x15
0x16
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
1 byte n bytes structure with a variable logical channel
length (eg 60xx)
Word-array with a variable logical channel length
1 byte n words structure with a variable logical channel
length
Double word array with a variable logical channel length
1 byte n double words structure with a variable logical
channel length
R14: not used
R15: Alignment bits (RAM)
The analog terminal is set to a byte limit in the terminal bus with the alignment bits.
Manufacturer parameters 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.
User parameters
R31 - 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
Note
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.
R33 - R47
Registers that depend on the terminal type
Extended application area R47 - R63
These registers have not yet been implemented.
10 KL4112
Terminal-specific register description
Process variables R0 - R4: no function
R5: Raw DAC value Y_dac
The 16-bit value that is transferred to the DAC is referred to as the raw
DAC value. This is calculated from the process data via manufacturer and
user scaling.
R6 - R7: no function
Manufacturer parameters R17: Offset – Hardware
Hardware offset adjustment of the terminal is realized via this register.
R18: Gain-Hardware *2^-16, 0xFFFF corresponds 1
Hardware gain adjustment of the terminal is realized via this register.
R19: Manufacturer offset B_h
This register contains the offset of the manufacturer’s straight-line equation
(1.1). The straight-line equation is activated via R32.
R20: Manufacturer scaling A_h
16 bit unsigned integer * 2^-8 [0x0100]
This register contains the scaling factor of the manufacturer’s straight-line
equation (1.1). The straight-line equation is activated via R32.
A 1 corresponds to the register value 0x0100
Application parameters R32: Feature Register:
[0x0006]
The feature register determines the operating modes of the terminal.
Note: For compatibility reasons the standard output format is 16-Bit signed
integer (default). The positive scope for 0 to 20mA extends therefore from
0 to 32767(0x7FFF). This corresponds to 15 bits. For using all 16 bits of
the bus terminal, the manufacturer scaling must be deactivated .
Feature Bit No. Mode description
Bit 0
Bit 1
Bit 2
Bit 3 - 7
Bit 8
Bits 9 - 15
1 User scaling (1.2) active [0]
1 Manufacturer scaling (1.1) active [1]
0 Watchdog timer active [0]
- not used, don't change
0/1 0: manufacturer activation value [0]
- not used, don't change
R33: User offset B_w
16 bit signed Integer [0x0000]
This register contains the offset of the user straight-line equation (4.1.).
Thestraight-line equation is activated via R32.
R34: User scaling A_w
16 bit signed Integer * 2^-8 [0x0100]
This register contains the scaling factor of the user straight-line equation
(4.1) The straight-line equation is activated via R32.
Register description
The watchdog timer is on by default. In the event
of a watchdog overflow, either the manufacturer
or the user activation value is applied to output
of the terminal.
1: user activation value
KL4112
11
Register description
R35: User activation value
16 bit signed Integer [0x0000]
If the user activation value in R32 is activated, this value is applied to the
output of the terminal after a system reset or a watchdog timer overlow
(terminal has not received any process date for 100ms).
CONTROL byte
in process data transfer
Gain and offset adjustment
STATUS byte
in process data transfer
Register access via
process data transfer
Bit 7=1: register mode
Bit 6=0: read
Bit 6=1: write
Bits 0 to 5: address
Control/Status byte
The control byte is transferred from the controller to the terminal. It can be
used in the register mode (REG = 1) or in process data transfer (REG = 0).
The gain and offset of the terminal can be adjusted with the control byte
(process data transfer).The code word must be entered in R31 to enable
adjustment of the terminal. The terminal’s gain and offset can then be adjusted.
The parameters are not permanently stored until the code word is reset!
Control byte:
Bit7 = 0
Bit6 = 1 Terminal adjustment function is active
Bit4 = 1 gain adjustment
Bit2 = 0 slow clock = 1000ms
1 fast clock = 50ms
Bit1 = 1 up
Bit0 = 1 down
Bit3 = 1 offset adjustment
Bit2 = 0 slow clock = 1000ms
1 fast clock = 50ms
Bit1 = 1 up
Bit0 = 1 down
The status byte is transferred from the terminal to the controller. In the
case of the KL4112, the status byte has no function in process data transfer.
Register communication KL4112
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.
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).
The address of the register to be addressed is entered in bits 0 to 5 of the
control byte.
12 KL4112
0
63
Terminal´s
Control-/
HHL
L
Control byte in the
register mode
MSB
REG=1 W/R
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
status byte
C/S-bit 7
A5
K-Bus
User data
2 or mors bytes
Register description
A4
A3
A2
If control bit 7=0: input/output
If control bit 7=1:
registerconfiguration
A1
A0
Example
If control bit 7=1:
adress in the control bit 0-5
If control bit 6=0: read
If control bit 6=1: write
register set
64 words
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).
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,
Byte0
Control
0x88 0xXX 0xXX 0xXX
the terminal returns the following type designation (0x0BCE corresponds to
the unsigned integer 3022).
Byte0
Status
0x88 0x00 0x0B 0xCE
Byte1
Not used
Byte1
Not used
Byte2
Data OUT, high byte
Byte2
Data IN, high byte
Byte3
Data OUT, low byte
Byte3
Data IN, low byte
KL4112
13
Register description
A further example
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,
Byte0
Control
0xDF 0xXX 0x12 0x35
the user code word is set and the terminal returns the register address with
the bit 7 for register access and the acknowledgement.
Byte0
Status
0x9F 0x00 0x00 0x00
Byte1
Not used
Byte1
Not used
Byte2
Data OUT, high byte
Byte2
Data IN, high byte
Byte3
Data OUT, low byte
Byte3
Data IN, low byte
14 KL4112
Mapping in the bus coupler
Default: CANCAL,
CANopen, RS232,
RS485, ControlNet,
DeviceNet
Default: Interbus,
Profibus
Default: Lightbus,
Bus Terminal Controller
(BCxxxx)
Annex
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 KL4112
maps itself in the bus coupler depending on the set parameters.
Mapping in the bus coupler
The KL4112 is mapped in the bus coupler depending on the set parameters. If the terminal is evaluated completely, the terminal occupies memory
space in the process image of the inputs and outputs.
I/O Offset High Byte Low Byte
Complete evaluation = 0 3
MOTOROLA format = 0 2
Word alignment = X 1 D1 - 1 D0 - 1
0 D1 - 0 D0 - 0
I/O Offset High Byte Low Byte
Complete evaluation = 0 3
MOTOROLA format = 1 2
Word alignment = X 1 D0 - 1 D1 - 1
0 D0 - 0 D1 - 0
I/O Offset High Byte Low Byte
Complete evaluation = 1 3
MOTOROLA format = 0 2 D1 - 1 D0 - 1
Word alignment = 0 1 CT/ST - 1 D1 - 0
0 D0 - 0 CT/ST - 0
I/O Offset High Byte Low Byte
Complete evaluation = 1 3
MOTOROLA format = 1 2 D0 - 1 D1 - 1
Word alignment = 0 1 CT/ST - 1 D0 - 0
0 D1 - 0 CT/ST - 0
I/O Offset High Byte Low Byte
Complete evaluation = 1 3 D1 - 1 D0 - 1
MOTOROLA format = 0 2 - CT/ST - 1
Word alignment = 1 1 D1 - 0 D0 - 0
0 - CT/ST - 0
I/O Offset High Byte Low Byte
Complete evaluation = 1 3 D0 - 1 D1 - 1
MOTOROLA format = 1 2 - CT/ST - 1
Word alignment = 1 1 D0 - 0 D1 – 0
0 - CT/ST - 0
Annex
KL4112
15
Annex
Legend
Complete evaluation: the terminal is mapped with control / status byte.
Motorola format: the Motorola or Intel format can be set.
Word alignment: the terminal is at a word limit in the bus coupler.
CT: Control- Byte (appears in the PI of the outputs).
ST: Status- Byte (appears in the PI of the inputs).
D0 - 0 : D0 = Data-Low-Byte, 0 = channel 1
D1 – 1 : D1 = Data-High-Byte, 1 = channel 2
16 KL4112
Table of the register
Register set
Address Description Default R/W Storage medium
R0
not used 0x0000 R
R1
not used 0x0000 R
R2
not used 0x0000 R
R3
not used 0x0000 R
R4
not used 0x0000 R
R5
Raw DAC value variable R RAM
R6
Diagnostic register 0x0000 R RAM
R7
Command register 0x0000 R
R8
Terminal type 4012 R ROM
R9
Software version number 0x???? R ROM
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R20
R21
R22
R23
R24
R25
R26
R27
R28
R29
R30
R31
R32
R33
R34
R35
R36
R37
R38
R39
R40
R41
R42
R43
R44
R45
R46
R47
Multiplex shift register 0x0218 R ROM
Signal channels 0x0218 R ROM
Minimum data length 0x9800 R ROM
Data structure 0x0000 R ROM
not used 0x0000 R
Alignment register variable R/W RAM
Hardware version number 0x???? R/W SEEROM
Hardware offset adjustment specific R/W SEEROM
Hardware-gain adjustment specific R/W SEEROM
Manufacturer scaling: offset 0x0000 R/W SEEROM
Manufacturer scaling: gain 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
Code word register variable R/W RAM
Feature register 0x0020 R/W SEEROM
User offset 0x0000 R/W SEEROM
User gain 0x0100 R/W SEEROM
User activation value 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
not used 0x0000 R/W SEEROM
KL4112
17
Support and Service
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products!
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You will also find further documentation for Beckhoff components there.
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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
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hotline: + 49 (0) 5246/963-157
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e-mail: support@beckhoff.com
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The Beckhoff Service Center supports you in all matters of after-sales service:
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18 KL4112
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