1. The VARAN Bus

2. The VARAN Bus, the Real-Time Ethernet Bus System
LASAL Highlights at a Glance
The VARAN Bus, the Real-Time Ethernet Bus System
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

3. Uses the Manager/Client Principle
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

4. Various Tasks for Various Jobs
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

5. VARAN Frame vs. Standard Ethernet Frame
VARAN Function Principle
VARAN Frame vs. Standard Ethernet Frame

6. The VARAN Bus, Integrated Safety
The VARAN Bus Speaks Safety
The VARAN Bus, Integrated Safety
Black channel principle
Decentralized Safety solutions
SIL-3, IEEE 61508, PL e

7. The VARAN Bus is Simple Automatic addressing Simple function
VARAN Function Principle
The VARAN Bus is Simple
Automatic addressing
Simple function
Simple instruction sets
Data exchange over a
common address
range
Up to 65, participants

8. Components of a VARAN Connection
VARAN Function Principle
Components of a VARAN Connection
VARAN protocol executed completely in the hardware
Inexpensive standard components are used

9. Electronic type label Unique identification for each participant
VARAN Function Principle
Electronic type label
Unique identification for each participant

10. The VARAN Bus: Access Times
Performance Characteristics
The VARAN Bus: Access Times
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

11. Communication during an error
Data Security
High Data Security
Industrial environment affected by disruptions
When data is lost: Data is resent in the same bus cycle
Communication during an error

12. Flexible Network Principle
Function principle
Flexible Network Principle
Hot-Plug capability
Automatic addressing
Electronic type label
Only 1 IP address per machine

13. Synchronous Multi-Manager Systems
Function Principle
Synchronous Multi-Manager Systems
Modular configuration of production lines

14. VNO, Strong Together VARAN BUS USER ORGANIZATION e.V.
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

15. The VARAN bus, the Real-Time Ethernet Bus System
What is the VARAN Bus
The VARAN bus, the Real-Time Ethernet Bus System

16. The VARAN Bus, the Optimal Connection
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

17. From the Smallest Sensor to the World Wide Web
Topology Examples
From the Smallest Sensor to the World Wide Web
Internet
Office / control level
Field level
Injection molding machine
Handling
Injection molding machine
Handling

18. Modular Machine Construction with Central Controls
Topology Examples
Modular Machine Construction with Central Controls
Central control
Control computer
Service PC
Switch
TCP / IP
TCP / IP
VARAN
Injection moulding machine
Conveyor system
Robot

19. VARAN Bus in the Machine Temperature control unit
Topology Examples
VARAN Bus in the Machine
TCP / IP
DVI
Length measuring
systems
TCP / IP
VARAN
VARAN
Multi Manager
Hydraulics
TCP / IP
VARAN
Drives
Temperature control unit
Sensors
I/O Modules
Service Laptop

20. Package Sorting System TNT Distribution Centre
Application Example
Package Sorting System TNT Distribution Centre
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

21. TNT Distribution Centre Package Sorting System
Application Example
TNT Distribution Centre Package Sorting System
Schematic diagram
Light barrier
Spring or air actuator
(Max. 128 VDM)

22. TNT Distribution Centre Package Sorting System
Application example
TNT Distribution Centre Package Sorting System

23. With the VARAN bus you increase
performance
and data security