the varan bus, the real-time ethernet bus system 1 / 23 the varan bus
TRANSCRIPT
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 1 / 23
The VARAN Bus
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 2 / 23
Hard real-time Cycle times < 100 µs and jitter < 100 ns
High data security For use in harsh industrial environments
Short packet lengths up to a max. of 128 bytes
Flexible network principle Line, star and tree structures can be combined as desired.
Modular machine structures
Low system costs
Use of inexpensive standard components
The VARAN Bus, the Real-Time Ethernet Bus System
LASAL Highlights at a Glance
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 3 / 23
VARAN Function Principle
Uses the Manager/Client Principle
Guaranteed data consistency with reconfirmation of each message Distributed clocks are not required: synchronization with a PLL mechanism
Cycle time < 100 µs
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 4 / 23
VARAN Function Principle
Various Tasks for Various Jobs
Standard Ethernet packets are tunnelled Maximum protection against
unauthorized access! No firewall needed!
Asynchronous direct access during the bus cycle
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 5 / 23
VARAN Function Principle
VARAN Frame vs. Standard Ethernet Frame
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 6 / 23
The VARAN Bus Speaks Safety
The VARAN Bus, Integrated Safety
Black channel principle
Decentralized Safety solutions
SIL-3, IEEE 61508, PL e
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 7 / 23
VARAN Function Principle
Automatic
addressing
Simple
function
Simple
instruction sets
Data exchange over a
common address
range
Up to 65,280
participants
The VARAN Bus is Simple
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 8 / 23
Components of a VARAN Connection
VARAN Function Principle
VARAN protocol executed completely in the hardware Inexpensive standard components are used
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 9 / 23
Electronic type label
VARAN Function Principle
Unique identification for each participant
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 10 / 23
The VARAN Bus: Access Times
Performance Characteristics
Bus cycle times < 100 µs
Isochronous access time 2.18 µs 8 I/Os = 1 byte 5.05 µs 1 drive
16 bytes r/w Asynchronous direct access < 25 µs 128 bytes
Synchronicity-inaccuracy < 100 ns jitter
Portable to Gigabit Ethernet without protocol changes
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 11 / 23
High Data Security
Communication during an error
Industrial environment affected by disruptions When data is lost: Data is resent in the same bus cycle
Data Security
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 12 / 23
Hot-Plug capability
Automatic addressing
Electronic type label
Only 1 IP address per machine
Function principle
Flexible Network Principle
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 13 / 23
Synchronous Multi-Manager Systems
Function Principle
Modular configuration of production lines
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 14 / 23
VNO, Strong TogetherVARAN BUS USER ORGANIZATION e.V.
VARAN BUS USER ORGANIZATION
Founded in 2006, registered organization, independent
The VNO holds the rights to the open VARAN bus technology
Control-independent
Unlimited VARAN technology user rights for members
Defined connection technology
Cooperation with organizations such as VDMA. CiA
CANopen® mapping in VARAN
Consultation, maintenance and development of the standard
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 15 / 23
What is the VARAN Bus
The VARAN bus, the Real-Time Ethernet Bus System
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 16 / 23
VARAN bus Connection Technology
The VARAN Bus, the Optimal Connection
Industrial RJ45 (IP 20) connector
Signal and power supply with hybrid cable M12 connector plug (IP67) up to 2 A 8+4 power / Ethernet connection technology (IP67) up to 10 A
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 17 / 23
Topology Examples
From the Smallest Sensor to the World Wide Web
Field level
Office / control level
Injection molding machine
Injection molding machine
Handling
Handling
Internet
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 18 / 23
Topology Examples
Modular Machine Construction with Central Controls
Central control
TCP / IP
Control computer
Conveyor system
Service PC
RobotInjection moulding
machine
Switch
TCP / IP
VARAN
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 19 / 23
Topology Examples
VARAN Bus in the Machine
VARAN
Multi Manager
SensorsTemperature control unit
I/O ModulesService Laptop
Hydraulics
Length measuring
systems
TCP / IP
TCP / IP
VARAN
TCP / IP
VARAN
DVI
Drives
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 20 / 23
Application Example
Developed by VAN-RIET, Dutch specialist for material
handling systems
Production increase of 80% compared to the current field bus
solution
9,000 packages sorted per hour
Minimum runtime: under 1 ms
Update time < 200 µs
Maximum scan rate with 128 VARAN digital mixed modules
=> corresponds to a maximum of 1024 I/Os networked with the VARAN bus
Package Sorting System TNT Distribution Centre
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 21 / 23
Application Example
Schematic diagram
TNT Distribution Centre Package Sorting System
Light barrierSpring or air actuator
(Max. 128 VDM)
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 22 / 23
Application example
TNT Distribution Centre Package Sorting System
The VARAN Bus, the Real-Time Ethernet Bus Systemwww.varan-bus.net 23 / 23
VARAN Bus
With the VARAN bus you increase
performance
and data security