Euchner Bus Systems Overview

1
Euchner Bus SystemsOverview

• What is a bus and why do we use it?
• Different bus systems
• Interbus
• Profibus
• CAN
• Devicenet
• AS-Interface
• Safe Bus systems
• AS-Interface Safety at Work products
• Why use AS-Interface Safety at Work
• Applications

2
What is a Bus?Terms

• Network Connection of multiple components by
  means of communications bus
• Gateway/Bridge Allows communication transfer from
  one bus system to another bus system
• Master Controlling participant on a bus
• Slave Subscriber on a bus, which is only active
  upon demand of the master bus
• Actor/Sensor Bus Bus below the control level
• Field bus Bus in the lower control level
• Cell level Communication of control and master
  computer (system level)
• I/O Box Allows active or passive access to a bus
  system
• Address Individual identification number of a
  subscriber on a bus
• Serial Transfer of data serially
• Parallel Transfer of multiple data simultaneously
• Protocol Definition, how data is being
  transferred

3
Levels of Communications
Automation and Management of Factory
PLC, PC, IPC ...
Master
Field level
CAN DeviceNet FIP Interbus Profibus Ethernet
etc.
4
What is a Bus?ISO/OSI Model

• Layer 1
• Physical Layer
• Layer 2
• Linkage Layer
• Layer 3
• Network Layer
• Layer 4
• Transport Layer
• Layer 5
• Session Layer
• Layer 6
• Presentation Layer
• Layer 7
• Application Layer

• Physical connectionElectrical and mechanical
• Saving the transferAccess and application flow
• Switching the physical transfer
• Transparent and confident transfer
• between subscribers
• Assembly, synchronization and disassembly of
  connections
• Conversion of data according
• to the coding
• Services for user functions

5
What is a Bus?Access to the Bus

• Master Slave
• Master allows the slaves to send on the bus
• Subscribers respond only if polled (requested) by
  the master

• Token (Ring) Method
• Sending permission is passed round
• Subscriber works only, when sending permission is
  given

• Random Access
• Checking if bus is free
• Subscribers can always access the bus

6
What is a Bus?Addressing

• With Assigned Address
• By means of programming device
• By means of DIP-Switch
• The subscriber gets only data which is addressed
  to it, except broadcast information
• Without address
• By means of identification
• In order
• Allocating addresses during start phase
• Everyone obtains all data

7
Euchner Bus SystemsOverview

• What is a bus and why do we use it?
• Different busses
• Interbus
• Profibus
• CAN
• Devicenet
• AS-Interface
• Safe Bus systems
• AS-Interface Safety at Work products
• Why AS-Interface Safety at Work
• Applications

8
EUCHNER Bus Systems

• What is a Bus and why do we use it?
• Different Bus Systems
• Interbus
• Profibus
• CAN
• DeviceNet
• AS-Interface
• Safe Bus Systems
• AS-Interface Safety at Work products
• Why use AS-Interface Safety at Work
• Applications

9
Different BussesAS-Interface

• Connection by means of piercing technology (No
  connectors necessary)
• 2 wire cable
• Passive and Active coupling modules
• Often M8 or M12 on active I/O box used
• Flexible topology
• Length up to 100 m (without repeater)
• Maximum 2 repeaters, length up to 300 m
• 31 devices (safe) or 62 devices (non safe)
• Minimum 1 master
• Minimum 1 AS-i power supply
• Master-Slave architecture
• Energy and data on one cable
• Optional energy cable (black)

10
Different BussesAS-Interface

• Bus in the lower level (Sensor/ Actuator)
• Simple assembly
• Little user data, little overhead
• 4 Bit outputs
• 4 Bit entries
• Special power supply necessary
• Response time depends on number of subscribers
• lt 5 ms
• lt 10 ms according to specification 2.1 with A/B
  Slaves
• Inexpensive Cost of interface connection

11
EUCHNER Bus Systems

• Grundlagen Bussysteme?
• Verschiedene Busse
• Interbus IBS Fernbus
• Profibus
• CAN
• DeviceNet
• AS-Interface
• Safe Bus systems
• AS-Interface Safety at Work products
• Why use AS-Interface Safety at Work?
• Applications

12
Safe Bus SystemsSolutions

• Open systems
• AS-Interface Safety at Work (available)
• ProfiSafe (available)
• DeviceNet Safety (not available)
• Interbus Safety (not available)
• CANopen Safety (not available)
• Proprietary systems
• Esalan (Schmersal-Elan, available)
• SafetyBus p (Pilz, available)
• General for open systems
• Safe subscribers on the same line as standard
  subscribers
• Gateways available (not safe)

13
Safe Bus SystemsFailures in operation mode

• Possible failures on a bus
• Repeating of telegrams
• Lost of telegrams
• Insertion of telegrams
• Wrong sequence
• Corruption
• Delay
• Methods against failure
• Checksums
• Repetition
• Disconnect faulty subscribers
• Time
• Should not be indefinite

14
AS-Interface Safety at WorkCharacteristics

• 31 subscribers, extension to 62 w/ V2.1 firmware
• Characteristics same as AS-Interface standard
• Hybrid operation
• Additional devices on bus for safety
• Safety monitor, programmable, highly flexible
• Safe slaves, every slave with one safe
• input
• Safety at Work available products
• I/O box (coupling modules)
• E-stop
• Safety switch with and without guarded lock
• Proximity switch
• Light grid, light barrier
• No safety PLC necessary

15
AS-Interface Safety at WorkTelegram

• Data transmission per slave address
• User data as standard AS-Interface,Maximum
  duration 5 ms
• 4 Bit Input
• 4 Bit Output
• User data as AS-Interface with A/B modules,
  maximum duration 10 ms
• 4 Bit Input
• 3 Bit Output
• User data as AS-Interface (Safety at Work)
• 1 Bit Input (safe)
• 4 Bit Output (not safe)

I/O
AS-Interface Master
Safety Slave
Repeater
AS-Interface power supply

Analogue
Safety Monitor
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AS-Interface Safety at WorkNetwork Example
Standard-PLC andstandard AS-Interface master
Safe module
Safety monitor
Standardmodule
Safe E-stop
Safe light grid
AS-Interface - power supply
Safe switch
Safe light barrier
Standardmodule
17
AS-Interface Safety at WorkSafety Monitor
Functions

• Data transfer by means of 8 different 4 Bit words
  in a predetermined order
• Safety monitor monitors the data flow, safety
  outputs are switched accordingly
• Data Transfer Control analyzed directly
• Switched off is value 0
• Switched on is taken out of the Bit combination
• 2 contacts can be encrypted in the 4 Bits,
  allowing additional diagnostics
• Each of the 4 outputs can be used, allowing
  additional functionality

18
Euchner Bus SystemsOverview

• What is a bus and why do we use it?
• Different busses
• Profibus
• AS-Interface
• Safe Bus systems
• AS-Interface Safety at Work products
• Why AS-Interface Safety at Work
• Applications

19
AS-Interface Safety at WorkSafety Switch with
Guarded Interlock TZ

• All characteristics of standard TZ
• With solenoid interlock device
• According to machinery directive
• Approved in automotive industry
• Rugged solution with anodized die-cast light
  alloy housing
• Adjustable approach direction
• Programmable LEDs
• Versions
• Left, right
• Electrically locked
• Mechanically locked
• With emergency unlocking device (screw)

20
AS-Interface Safety at WorkConnection of TP / TZ
to bus line
Bus coupling module BCM
Safety switch with guarded interlock TP
M12 cable
21
AS-Interface Safety at WorkBus Coupling Module
BCM

• For connection of flat lines to M12 cable
• 4 inserted gaskets, piercing over the length of
  the module possible
• Gaskets for coding of flat line
• Gasket for ending of cable within the module
  available
• Unique 3 stab design eliminates installation
  errors

22
AS-Interface Safety at WorkSafety Monitor SFM

• Necessary for Safety at Work
• Versions
• SFM-A01 1 Channel
• SFM-A02 2 Channel
• Dependent channels
• Independent channels
• SFM-B02 2 Channel
• Enhanced functionality
• Main function is an efficient, programmable
  safety relay
• Input operation
• Guard door (safety gate switch)
• E-stop
• Two hand control
• Light curtains, light grids
• Modules

23
AS-Interface Safety at WorkSafety Monitor SFM

• Mode of operation
• Output modes
• Stop category 0
• Stop category 1
• Guard door with guarded lock (only 2 channel
  version)
• Channels to configure for dependent or
  independent mode
• Provides diagnostics for the main control

24
AS-Interface Safety at WorkWhat if a Safety at
Work component fails?

• Failure in safe slave
• Safety circuit opens
• Replacement with same type
• Monitor teaches new slave by itself
• Failure in monitor
• Safety circuit opens
• Replacement with new monitor
• Configuration via PC softwareorretrieve data
  directly out of the defective monitors non
  volatile memory
• Failure in standard slave
• No effect on safety operation

25
AS-Interface Safety at WorkCategories according
to EN 954-1

• AS-Interface Safety at Work
• Category 4 for interface, wiring and monitor
• Approved by TÜV Nord (notified body)
• Redundant coupling of sensors to the interface
• Communication dynamically secured via the monitor
• Switch Off through the monitor
• Every failure on the bus line is detected (break,
  short circuit or data error)
• Monitor replaces safety relay
• Safety Category over all relates to the entire
  system, not any single component

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Bus Projects at EUCHNERAS-Interface

• AS-Interface Safe in TZ
• Available
• AS-Interface Safe in TP
• Available
• AS-interface Safe in NZ
• Available
• AS-Interface Safe I/O Box
• Available mid 2004
• AS-Interface Safe Monitor, enhanced version
  SFM-B02
• Available
• Passive bus coupling device
• Available
• Enabling pendants
• Available

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Euchner Bus SystemsOverview

• What is a bus and why do we use it?
• Different busses
• Profibus
• AS-Interface
• Safe Bus systems
• AS-Interface Safety at Work products
• Why AS-Interface Safety at Work
• Applications

28
TZ AS-Interface and TP AS-InterfaceBlock diagram
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AS-Interface Safety at WorkConnection of TZ
AS-Interface for process protection
30
Bus SystemsConnection of TZ AS-Interface for
process protection
31
AS-Interface Safety at WorkConnection of TZ
AS-Interface for personal safety with safe time
32
AS-Interface Safety at WorkConnection of TZ
AS-Interface for personal protection with
standstill indicator
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Euchner Bus SystemsOverview

• What is a bus and why do we use it?
• Different busses
• Profibus
• AS-Interface
• Safe Bus systems
• AS-Interface Safety at Work products
• Why AS-Interface Safety at Work
• Applications

34
AS-Interface BusWhy use AS-interface?

• Answer of users
• Siemens report in journal Busprofi August
  2002Company GreCon Dimter
• Reduction of costs of 60 in installation of
  plant for dovetail milling and pressing
• Safety at Work not applied
• Answer of users

60
60
60
35
AS-Interface and AS-Interface Safety at WorkWhy
use AS-interface?

• Answer of users
• EUCHNER report in AS-Interfacehandbook
  2002Company ZF Lemförde
• Reduction of costs of 70 in wiring for standard
  components
• Safety at Work is applied, but not yet calculated
• Short downtimes in case of defects

36
AS-Interface BusWhy use AS-Interface Safety at
Work?
Conventional wiring -many cables -many wiring
points -multiple safety relays -high labor
investment
37
AS-Interface BusWhy do we do that?

• AS-Interface Wiring
• Significant cable reduction
• Significant wiring point reduction
• Significant safety relay module reduction
• Significant labor reduction