BECKHOFF BK3000 User Manual
PROFIBUS Coupler
BK3000, BK3010, BK3100,
BK3110, BK3500, LC3100
Technical Hardware Documentation
2006-11-27
Version 2.2
Contents
Contents
1. Foreword 4
Notes on the documentation 4
Liability Conditions 4
Delivery conditions 4
Copyright 4
Safety Instructions 5
State at Delivery 5
Description of safety symbols 5
2. Basic information 6
The Beckhoff bus terminal system 6
The interfaces 8
Power supply 9
Power supply to the power contacts 9
Power contacts 9
Fieldbus connection 9
Configuration interface 9
K-bus contacts 10
Supply isolation 10
The operating modes of the bus coupler 11
Mechanical construction 12
Electrical data 14
The peripheral data in the process image 15
Starting operation and diagnostics 18
Terminal bus error 19
Profibus configuration data errors: BK3000/BK3100 19
Profibus configuration data errors: BK3010/BK3110/BK3500 19
Remedial measures for fieldbus errors 21
Fieldbus errors in the BK3000/BK3100 21
Fieldbus errors in the BK3010/BK3110/BK3500 21
Fieldbus errors in the LC3100 22
Run times and reaction times 22
3. PROFIBUS coupler BK3xx0 in the PROFIBUS DP 24
Introducing the system 24
PROFIBUS DP 24
The transfer medium: plugs and cables 29
Configuring the master 32
Quick start 32
S5 Example 33
S7 Example 36
TwinCAT Example 37
2 BK3xxx/LC3100
Contents
4. Appendix 38
Example: process image in the bus coupler 38
Representation of analog signals in the process image 40
PROFIBUS DP 42
Parameterisation telegram 42
Configuration telegram 46
Auto-configuration 46
Programmed configuration (only BK3000 and BK3100) 48
Diagnostics 48
DPV1 PROFIBUS 52
Combined operation with PROFIBUS DP and PROFIBUS FMS 55
PROFIBUS FMS 56
Miscellaneous 65
Index 66
5. Support and Service 67
Beckhoff's branch offices and representatives 67
Beckhoff Headquarters 67
BK3xxx/LC3100 3
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.
4 BK3xxx/LC3100
i
Foreword
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
Attention
Note
environment.
This symbol indicates information that contributes to better understanding.
BK3xxx/LC3100 5
Basic information
Basic information
Up to 64 bus terminals
each with 2 I/O channels
for any form of signal
Decentralized wiring of the
I/O level
IPC as control unit
Bus couplers for all current
bus systems
Standard C rail assembly
Modularity
Display of channel status
The K-bus
End terminal
The Beckhoff bus terminal system
The bus terminal system is the universal connecting link between a
fieldbus system and the sensor/actor level. A unit consists of a bus coupler,
which is the interface to the fieldbus, and up to 64 electronic terminals, of
which the last is an end terminal. Terminals, each with two I/O channels,
are available for any form of technical signal and can be combined as
desired. The various types of terminal are all constructed in the same way,
so that the planning costs are kept extremely low. The height and depth of
the construction are calculated for compact terminal cabinets.
Fieldbus technology makes it possible to use compact control
architectures. The I/O level does not need to be taken right up to the
control unit. Sensors and actors can be connected decentrally with minimal
lengths of cable. You can position the control unit at any convenient
location in the installation. Using an industrial PC as control unit makes it
possible to implement the operating and monitoring element as part of the
control hardware, so the control unit can be located on an operating desk,
control point or similar. The bus terminals constitute the decentralized
input/output level of the control unit in the switch cabinet and its
subordinate terminal cabinets. As well as the sensor/actor level, the power
unit of the equipment is also controlled via the bus system. The bus
terminal replaces a conventional terminal as the cabling level in the switch
cabinet; the switch cabinet can be made smaller.
The Beckhoff bus terminal system combines the advantages of a bus
system with the functionality of compact terminals. Bus terminals can be
used on all current bus systems and serve to reduce the diversity of parts
in the control unit, while behaving like the conventional standard units for
the relevant bus system and supporting the entire range of functionality of
the bus system.
The simple and compact assembly on a standard C rail, and the direct
cabling of actors and sensors without cross connections between the
terminals, serve to standardize the installation, as does the uniformly
designed labeling.
The small size and great flexibility of the bus terminal system mean that
you can use it anywhere that you could use a terminal and use any type of
connection – analog, digital, serial or direct sensors.
The modular construction of the terminal row, using bus terminals with
various functions, limits the number of unused channels to at most one per
function. Two channels to a terminal is the optimum solution for the number
of unused channels and the cost per channel. The possibility of using
power input terminals to provide separate power supplies also helps to
minimize the number of unused channels.
The integrated light-emitting diodes close to the sensor/actor indicate the
status of each channel.
The K-bus is the path taken by data within the terminal row. The bus
coupler carries the K bus through all the terminals by means of six contacts
on the side walls of the terminals, and the end terminal terminates the K
bus. The user does not need to know anything about the function of the K
bus or the internal operation of terminals and bus couplers. There are
numerous software tools available which provide for convenient planning,
configuration and operation.
6 BK3xxx/LC3100
Power input terminals
for
separately powered groups
Three power contacts pass the operating power to the following terminals.
You can use power input terminals to subdivide the terminal row as desired
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.
You can install up to 64 terminals on a terminal row, including power input
terminals and the end terminal.
The principle of the bus
terminal
Basic information
Bus couplers for various
fieldbus systems
You can use a variety of bus couplers to attach the electronic terminal row
quickly and easily to the various fieldbus systems, and you can also
subsequently convert to a different fieldbus system. The bus coupler deals
with all the necessary monitoring and control tasks for operating the
attached bus terminals, indeed all the operation and configuration of the
bus terminals is carried out via the bus coupler. The fieldbus, K bus and I/O
level are electrically isolated.
If the exchange of data across the fieldbus is temporarily interrupted, logic
states are preserved, digital outputs are cleared and analog outputs revert
to a reset value which can be individually configured for each output when
the equipment is set up.
BK3xxx/LC3100 7
Basic information
bus coupler, external
00
LC3100
Beckhoff
K-Bus
0 V
Power contacts
I/O-RUN
I/O-ERR
The Profibus coupler
BK3xx0
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 Profibus coupler
LC3100
The LC3100 bus coupler integrates the bus connection into the springloaded terminals.
0201
X0
RUN
BF
A B
Adress
selector
+ +
A, B
Configuration
port
Power supply
S S
Shield
8 BK3xxx/LC3100
BK3xx0:
24 V DC on the topmost
terminals
LC3100:
24 V DC to the central pairs
of terminals
Lower 3 terminal pairs for
power input
maximum 24 V
maximum 10 A
Spring contacts at the side
BK30X0, BK31X0
9 pin sub-D socket strip
BK3500 LWL (optical
fibres)
LC3100: Bus connection
via spring loaded terminals
Serial interface under the
front flap
Power supply
The bus couplers need an operating power of 24 V DC which is connected
via the topmost spring terminals, labeled "24 V” and "0 V”. This power
supply serves not only the electronic components of the bus coupler but
(via the K bus) also the bus terminals. The power supply of the bus coupler
circuitry and that of the K-bus (Terminal bus) are electrically isolated from
the voltage of the field level.
The LC3100 bus coupler is supplied via the two central terminal pairs. The
power contacts pass the supply voltage on to the field level.
Power supply to the power contacts
The six lower connections with spring terminals can be used to supply
power to the peripherals. The spring terminals are connected in pairs to the
power contacts. The power supply to the power contacts has no
connection to the power supply of the bus couplers. The power input is
designed to permit voltages up to 24 V. The pair-wise arrangement and the
electrical connection between the feed terminal contacts makes it possible
to loop through the wires connecting to different terminal points. The load
on the power contact may not continuously exceed 10 A. The current
capacity between two spring terminals is the same as the capacity of the
connecting wires.
Power contacts
On the right-hand side face of the bus coupler are three spring contacts
which are the power connections. The spring contacts are recessed in slots
to prevent them from being touched. When a bus terminal is connected,
the blade contacts on the left-hand side of the bus terminal are connected
to the spring contacts. The slot and key guides at the top and bottom of the
bus couplers and bus terminals ensure reliable location of the power
contacts.
Fieldbus connection
There is a recessed front face on the left hand side. The typical Profibus
connecting plug can be inserted here. A full description of the fieldbus
interfaces is found elsewhere in this manual. (In the section on The
Medium: Plugs and Cables)
The plugs for the optical fibres are 2 HP Simplex plugs that are inserted
into the sockets. The two required plugs are included.
In the LC3100 bus coupler the bus is connected directly at the upper
terminal pair.
Configuration interface
On the lower part of the front face you will find the standard bus couplers
which are fitted with an RS232 interface. The miniature plug can be
attached to a PC by means of a connection cable and the configuration
software KS2000. This interface enables you to configure the analog
channels. You can also access the functionality of the configuration
interface via the fieldbus by means of the PLC interface communications.
Basic information
BK3xxx/LC3100 9
Basic information
Periphery level
Bus terminals
Bus coupler
24 V DC
6 contacts at the side
3 supply groups:
fieldbus
K-bus
peripheral level
Setting up the power levels
in the bus terminal system
K-bus contacts
The connections between the bus coupler and the bus terminals are
effected by gold contacts at the right-hand side of the bus coupler. When
the bus terminals are plugged together, these gold contacts automatically
complete the connection to the bus terminals. The K bus is responsible for
the power supply to the electronic components of the K bus in the bus
terminals, and for the exchange of data between the bus coupler and the
bus terminals. Part of the data exchange takes place via a ring structure
within the K bus. Disengaging the K bus, for example by pulling on one the
bus terminals, will break this circuit so that data can no longer be
exchanged. However, there are mechanisms in place which enable the bus
coupler to locate the interruption and report it.
Supply isolation
The bus couplers operate with three independent supplies. The input
power supplies the electrically isolated K-bus circuitry in the bus coupler
and the K-bus itself. The power supply is also used to generate the
operating power for the fieldbus.
Note: All the bus terminals are electrically isolated from the K bus, so that
the K-bus is completely electrically isolated.
Terminal bus
Field bus
10 BK3xxx/LC3100
Start-up behavior of the bus
coupler
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
accessible from outside. If an error occurs the bus coupler will enter the
operating mode "STOP”. If the start-up sequence is completed without
errors the bus coupler will enter the mode "fieldbus start”.
Basic information
Power on selftest
Bus terminal test
Structure list
OK
Error
PLC start /
Communication start
Stop
The bus coupler reports the error to the master by means of the Profibus
diagnostics. Clearing the error returns the bus coupler to its normal
operating mode.
BK3xxx/LC3100 11
Basic information
02
01
+
+
S
S
A
B
00
X0
LC3100
Beckhoff
21
020201
01
+++
+
PE
RUN
DIA
24V
4
3
2
1
0
0
47
12
Mechanical construction
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. The dimensions of the bus couplers do not depend on the
fieldbus system. If you use large plugs, for example like some of the bus
plugs used for the Profibus, they may protrude above the overall height of
the cabinet.
Dimensions of a bus
coupler
PROFIBUS
BF
24V
0V
0V
94
0
1
9
2
8
3
7
4
6
5
BECKHOFF
BK 3000
PEPEPE
0
1
9
8
7
6
5
Assembly and connections
Maximum number of
terminals
The overall width of the construction is the width of the bus coupler,
including the bus end terminal, plus the width of the installed bus terminals.
The bus terminals are 12 mm or 24 mm wide, depending on their function.
The LC3100 has a width of 21 mm and the terminals then follow, as on the
coupler. Depending on the gauge of cables used the overall height of 68
mm may be overstepped by about 5 mm to 10 mm by the cables at the
front.
It takes only a slight pressure to latch the bus coupler and the various bus
terminals onto a supporting 35mm C rail and a locking mechanism then
prevents the individual housings from being removed. You can remove
them without effort if you first release the latching mechanism by pulling the
orange tab. You should carry out work on the bus terminals and the bus
coupler only while they are switched off: if you plug or unplug components
while the power is on you may briefly provoke some undefined state (and,
for instance, reset the bus coupler).
You can attach up to 64 bus terminals in series on the right-hand side of
the bus coupler. When you assemble the components, make sure that you
mount the housings so that each slot comes together with the
corresponding key. You cannot make any functional connections merely by
pushing the housings together along the supporting track. When they are
correctly mounted there should be no appreciable gap between the
adjacent housings.
The right-hand side of a bus coupler is mechanically similar to a bus
terminal. There are eight connections on the top which can be used to
12 BK3xxx/LC3100
Basic information
Insulation test
PE power contacts
connect to thick-wire or thin-wire lines. The connection terminals are spring
loaded. You open a spring terminal by applying a slight pressure with a
screwdriver or other pointed tool in the opening above the terminal and you
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. The K bus is responsible for
passing data and power to the electronic components of the bus terminals.
In the case of digital bus terminals, the field logic receives power via the
power contacts. Latching the components together has the effect that the
series of power contacts constitutes a continuous power track. Please refer
to the circuit diagrams of the bus terminals: some bus terminals do not loop
these power contacts through, or not completely (e.g. analog bus terminals
or 4-channel digital bus terminals). Each power input terminal interrupts the
series of power contacts and constitutes the beginning of a new track. The
bus coupler can also be used to supply power to the power contacts.
The power contact labeled "PE” can be used as protective earth or ground.
This contact stands proud for safety reasons and can carry short-circuit
currents of up to 125A. Note that in the interests of electromagnetic
compatibility the PE contacts are capacitively connected to the supporting
track. This may lead to spurious results and even damage to the terminal
when you test the insulation (e.g. insulation test for breakdown using a
230V mains supply to the PE line). You should therefore disconnect the PE
line on the bus coupler while you carry out insulation tests. You can
disconnect other power supply points for the duration of the test by drawing
the power supply terminals out from the remaining row of terminals by at
least 10mm. If you do this, there will be no need to disconnect the PE
connections.
The protective earth power contact ("PE”) may not be used for any other
connections.
BK3xxx/LC3100 13
Basic information
Electrical data
The Profibus couplers differ by virtue of their capacity levels and maximum
baud rates. The BK30xx variants are capable of supporting up to 1.5
MBaud and the LC3100 and BK31xx series support up to 12 Mbaud. The
electrical data specific to the fieldbus is given in this chapter. The following
data distinguishes between a standard and an economy variant (BK3x00
and BK3x10) and an low cost variant (LC3100). Compatability with the
Profibus is guaranteed in any case. Contrary to the standard bus coupler,
the economy variant is limited of the number of I/O´s. Thus, there is no
possibility of connecting inputs and outputs other than digital ones. The
following table lists an overview of all data:
Technical Data BK3000 BK3010 BK3100 BK3110 BK3500 LC3100
Supply voltage
Input current
Power-on surge
K bus supply
current up to
Configuration
facility
Number of bus
terminals
Digital
peripheral signals
Analogue peripheral
signals
Peripheral bytes
Baud rate
Protocol
Bus connection
Voltage of the
power contact
Power contacts
current drawn
Electric strength
Typical weight
Operating
temperature
Storage
temperature
Relative humidity
Vibration/
shock stability
EMC
immunity/transmissi
on
Installation location
Protection class
24 V DC
70mA +
(total K bus
current)/4,
500 mA max.
2.5 x steady operating current
1750 mA
max.
via KS2000 or the controller
64
256 inputs/outputs
128
inputs/output
s
244 bytes I /
244 bytes O
1.5 Mbaud 1.5 Mbaud 12 Mbaud 12 Mbaud 1.5 Mbaud 12 Mbaud
DP
FMS
D-sub
9-pin
24 V DC / AC max.
10 A max.
500 Veff (power contact / supply voltage / fieldbus)
none
170 g 150 g 170 g 150 g 170 g 75 g
0°C ... +55°C
-20°C ... +85°C
95% without dew formation
according to IEC 68-2-6 / IEC 68-2-27
according to EN 50082 (ESD, burst) / EN 50081
arbitrary
IP20
80mA +
(total K bus
current)/4,
200 mA max.
500 mA max. 1750 mA
--- 128
32 bytes I /
32 bytes O
DP
DPV1
D-sub
9-pin
70mA +
(total K bus
current)/4,
500 mA max.
max.
inputs/outputs
64 bytes I /
64 bytes O
DP only
128 bytes I /
128 bytes O
DP
FMS
D-sub
9-pin
80mA +
(total K bus
current)/4,
200 mA max.
500 mA max. 1750 mA
--- 128
32 bytes I /
32 bytes O
DP
DPV1
D-sub
9-pin
80mA +
(total K bus
current)/4,
500 mA max.
max.
inputs/output
s
128 bytes I /
128 bytes O
DP
DPV1
2 x HP
Simplex plug
60mA +
(total K bus
current)/4,
200 mA max.
500 mA max.
---
32 bytes I /
32 bytes O
DP
DPV1
Directly to the
spring-loaded
terminals
14 BK3xxx/LC3100
Current consumption on the
K-Bus
Digital signals
(bit-oriented)
Analog signals
(byte-oriented)
Special signals and
interface
For operation of the K-bus electronics, the bus terminals require energy
from the K-bus that is supplied by the bus coupler. Refer to the catalog or
the corresponding data sheets of the bus terminals for details of the K-bus
current consumption. In doing so, pay attention to the maximum output
current of the bus coupler that is available for powering the bus terminals.
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. .
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. A
distinction is made here between input and output and between bit-oriented
(digital) and byte-oriented (analog, or complex) signal processing.
It also forms two groups, whereby one contains only inputs and the other
only outputs. In each group, the byte-oriented channels take the lowest
addresses, in ascending order, and these are then followed by the bitoriented channels.
Digital signals are bit-oriented. This means that one bit of the process
image is assigned to each digital channel. The bus coupler sets up a block
of memory containing the current input bits and arranges to immediately
write out the bits from a second block of memory which belongs to the
output channels.
The precise assignment of the input and output channels to the process
image of the control unit is explained in detail in the Appendix by means of
an example.
The processing of analog signals is always byte-oriented and analog input
and output values are stored in memory in a two-byte representation. The
values are held as "SIGNED INTEGER” or "twos-complement”. The digit
"0” represents the input/output value "0V”, "0mA” or "4mA”. When you use
the default settings, the maximum value of the input/output value is given
by "7FFF” hex. Negative input/output values, such as -10V, are
represented as "8000” hex and intermediate values are correspondingly
proportional to one another. The full range of 15-bit resolution is not
realized at every input/output level. If you have an actual resolution of 12
bits, the remaining three bits have no effect on output and are read as "0”
on input. Each channel also possesses a control and status byte in the
lowest value byte. If the control/status byte is mapped in the control unit
has to be configured in the master configuration software. An analog
channel is represented by 2 bytes user data in the process image.
A bus coupler supports bus terminals with additional interfaces, such as
RS232, RS485, incremental encoder, etc.. These signals can be regarded
in the same way as the analog signals described above. A 16-bit data
width may not be sufficient for all such special signals; the bus coupler can
support any data width.
Basic information
BK3xxx/LC3100 15
Basic information
Default assignment of
inputs and outputs to the
process image
When the bus coupler is first switched on it determines the number of
attached bus terminals and sets up a list of assignments. This list
distinguishes between analog channels and digital channels and between
input and output; which are grouped separately. The assignments begin
immediately to the left of the bus coupler. The software in the bus coupler
creates the assignment list by collecting the entries for the individual
channels one at a time, counting from left to right. These assignments
distinguish four groups:
1.
2.
3.
4
Function type of the channel
Analog outputs
Digital outputs
Analog inputs
Digital inputs
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
O0
...
byte-oriented data
...
Ox
Ox+1
bit-oriented data
Ox+y
Input data in the bus
coupler
I0
...
byte-oriented data
...
Ix
Ix+1
...
bit-oriented data
...
Ix+y
Assignment level
byte-wise assignment
bit-wise assignment
byte-wise assignment
bit-wise assignment
16 BK3xxx/LC3100
The path from the I/Os to
the PROFIBUS process
image
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. The interaction
of the peripherals with the control unit means that data can initially be
guaranteed consistent only within an individual byte: the bits which make
up a byte are read in together, or written out together. Byte-wise
consistency is quite adequate for processing digital signals but is not
sufficient for transferring values longer than eight bits, such as analog
values. The various bus systems guarantee consistency to the required
length. It is important to use the appropriate procedure for importing this
consistent data from the master bus system to the control unit. You will find
a detailed description of the correct procedure in the User Guide of the
appropriate bus system, in particular in the description of the standard
master units that are installed. The chapters of this manual which deal with
the fieldbus refer to the most common of these standard units.
Processing complex signals
All byte-oriented signal channels such as RS232, RS485 and incremental
encoder, can use byte lengths greater than two. Apart from the actual
difference in length, the procedure is always comparable with that for
analog signals. In the configuration software for the bus masters of the
second generation (from around 09.96), the corresponding channel can be
selected directly from the "GSD file". The configuration software
automatically ensures the settings for maintaining data consistency.
BK3xxx/LC3100 17
Basic information
Starting operation and diagnostics
Installation guidelines
The "PROFIBUS Nutzerorganisation e.V." technical guidelines must be
followed when installing and laying the lead.
PROFIBUS-DP/FMS assembly guidelines
www.profibus.com
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. The error code can be determined from the frequency and
number of blinks. This permits rapid rectification of the error.
The diagnostic LEDs
The bus coupler has two groups of LEDs for the display of status. The
upper group with four LEDs indicates the status of the respective field bus.
The significance of the “field bus status“ LED is explained in the relevant
sections of this manual - it conforms to conventional field bus displays.
On the upper right hand side of the bus couplers are two more green LEDs
that indicate the supply voltage. The left hand LED indicates the 24 V
supply of the bus coupler. The right hand LED signals the supply to the
power contacts.
Local errors
Two LEDs, the “I/O” LEDs, in the area below the field bus status LEDs
referred to above, serve to indicate the operating status of the bus
terminals and the connections to these terminals. The green LED lights up
in order to indicate fault-free operation. The red LED blinks with two
different frequencies in order to indicate an error. The error is encoded in
the blinks as follows:
Code of flashes
Rapid flashing
First slow sequence
Second slow sequence
Start of the error code
Type of error
Location of error
Start PLC
Start of the error code Error type Error location
18 BK3xxx/LC3100
Terminal bus error
Error code Error code
argument
Persistent,
continuous
blinking
1 pulse
2 pulses
3 pulses
4 pulses
5 pulses
7 pulses
(BK3010,
BK3110, LC3100
only)
EMC problems - Check power supply for overvoltage or
0
1
2
0
n (n > 0)
0 Terminal bus command error - No terminal connected; attach terminals.
0
n
n
n
Description Remedy
EEPROM checksum error
Inline code buffer overflow
Unknown data type
Programmed configuration
Incorrect table entry / bus
coupler
Incorrect table comparison
(terminal n)
Terminal bus data error
Break behind terminal n (0:
coupler)0
n
Terminal bus error with register
communication with terminal n
Analogue terminal inserted
nth terminal is an analogue
terminal
Profibus configuration data errors: BK3000/BK3100
I/O-Err
6 pulses
8 pulses
0
n (n>0)
0
n (n>0)
Not enough DP-Cfg data received.
Faulty DP-Cfg data byte.
Not enough User-Prm data received
Faulty User-Prm data byte
Profibus configuration data errors:
BK3010/BK3110/BK3500
DIA
1 pulse
2 pulses
0
n (n>0)
0
n (n>0)
Not enough DP-Cfg data received.
Faulty DP-Cfg data byte.
Not enough User-Prm data received
Faulty User-Prm data byte
Basic information
undervoltage peaks
- 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)
- Set manufacturer’s setting with the
KS2000
- Connect fewer terminals; too many
entries in the table for the programmed
configuration
- Software update required for the coupler
- Check programmed configuration for
correctness
- Incorrect table entry / bus coupler
- One of the terminals is defective; halve
the number of terminals attached and
check whether the error is still present with
the remaining terminals. Repeat until the
defective terminal is located.
- Check whether the n+1 terminal is
correctly connected; replace if necessary.
– Check whether the end terminal 9010 is
connected.
Replace terminal n.
Remove nth terminal and switch the
coupler off and then on again.
Remedy
Check DP configuration.
Check DP user parameters.
Remedy
Check DP configuration.
Check DP user parameters.
BK3xxx/LC3100 19
Basic information
i
Profibus configuration data
error
LC3100 only
Note
BF
1 pulse
2 pulses
The number of flashes corresponds to the position of the last bus terminal
before the error, not counting passive bus terminals such as power input
terminals.
The bus coupler will carry on flashing the error code even when you have
cleared the fault and its operating mode will remain at "Stop”. The only way
to restart the bus coupler is by switching the power supply off and on
again.
You should not plug or unplug bus terminals from the series without first
turning off the power. The circuitry of the bus terminals and the bus coupler
is largely protected against damage, but if you modify the assembly while it
is under power, malfunctions and damage cannot be ruled out.
If a fault occurs during normal operation, the error code will not be output
on the LEDs until the bus coupler has been requested to diagnose the bus
terminals. This diagnostic request is generated after the equipment is
switched on.
The fieldbus status LEDs indicate the current operating mode of the
fieldbus. The functions of the Profibus are shown by the LEDs "RUN”, "BF”
and "DIA”; the fourth LED has no significance.
Please note that there is an association between the green I/O LED and
the fieldbus. The I/O LED lights up when access is made to the internal K
bus. The green I/O LED is not lit until data begins to be exchanged via the
fieldbus, because the Profibus initiates a new data exchange on the K bus
each time it accesses the bus coupler, which means that the fieldbus has
to access the bus coupler.
The bus coupler does, however, interrogate the configuration of the bus
terminals after power on and does not exchange any data with the
terminals. That is to say, the red I/O LED goes off after an error-free start
up without the green I/O LED having to light up. Then, the green I/O LED
does not light up until data exchange is begun via the field bus.
If a terminal bus error occurs during operation, the procedure followed
conforms to the reaction to the terminal bus errors parameterisation. If the
terminal bus error already occurs during start up, the slave does not
assume DP data transfer (Diag remains set).
0
n (n>0)
0
n (n>0)
Not enough DP-Cfg data received
Faulty DP-Cfg data byte
Not enough User-Prm data received
Faulty User-Prm data byte
20 BK3xxx/LC3100
Remedial measures for fieldbus errors
Fieldbus errors
The fieldbus status LEDs indicate the operational state of the fieldbus. The
functions of the Profibus are indicated by the “I/O-RUN” and “BF” LEDs in
the BK3000 and BK3100, and by the “I/O-RUN”, “BF” and “DIA” LEDs in
the BK3010, BK3110 and BK3500.
Fieldbus errors in the BK3000/BK3100
I/O-RUN BF Meaning Remedy
on
on
off
off
off Operating state: RUN
Inputs are read and outputs are set.
on 1. Bus activity, but slave is not yet
parameterised
2. Bus error in which the outputs
a.) become 0
b.) remain unchanged
off 1. Terminal bus cycles synchronised
DP-watchdog switched off, no exchange
of data
2. Reaction to Clear_Data
Master in Clear_Mode, reaction of the
terminal bus is stopped
on 1. No bus activity
2. Bus error with reaction
Terminal bus cycles are stopped
Everything is operating correctly
- Start master
- Check bus cable
- Check parameters
(-> Diagnostics data)
- Check configuration
(-> Diagnostics data)
PLC is in STOP mode
- Start master
- Check bus cable
- Check parameters
(-> Diagnostics data)
- Check configuration
(-> Diagnostics data)
Fieldbus errors in the BK3010/BK3110/BK3500
I/O-RUN BF DIA Meaning Remedy
on
on
off
off
off
off off Operating state: RUN
Inputs are read and outputs are set.
on off,
blinking
off off Terminal bus cycles synchronised
on on No bus activity
on off,
blinking
1. Bus activity, but slave is not yet
parameterised
2. Bus error in which the outputs
a.) become 0
b.) remain unchanged
DP-watchdog switched off, no exchange
of data
Bus error, reaction
Terminal bus cycles are stopped
Everything is operating correctly
- Start master
- Check parameters
(-> Diagnostics data, DIA-LED)
- Check configuration
(-> Diagnostics data, DIA-LED)
PLC is in STOP mode
- Start master
- Check bus cable
- Start master
- Check parameters
(-> Diagnostics data, DIA-LED)
- Check configuration
(-> Diagnostics data, DIA-LED)
Basic information
BK3xxx/LC3100 21
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