The VARAN BUS

VARAN Bus Presentation 1 / 27www.varan-bus.net

The VARAN BUS


The VARAN bus, the Real-Time Ethernet bus system

What is the VARAN bus?

• Uses standard Ethernet physics according to IEEE 802.3

• Protocol implemented completely in the hardware

• Use of short packets of up to 128 bytes

• High data reliability

• Automatic addressing

• Hard Real-Time with cycle times less than 100 µs and jitter less than 100 ns

• Direct access possible during the bus cycle

• Simple construction and command set

• Distributed clocks are not required (IEEE 1588)

• Hot-Plug capable



• Synchronized multi manager networks

• Standard Ethernet packets are tunneled

• Tree, line and star topology

• Defined connection technology

• Bus signal and power supply provided through a hybrid cable

• Electronic identification label

• Only one IP address per machine required

• CANopen image on VARAN

• Open, independent standard

• Free service and maintenance tools





• VARAN frame vs. standard Ethernet frame




• Automatic addressing




• Message repetition




• Various tasks for various functions

VARAN Manager

VARAN Client

Start new cycleStart new cycle

Isochronous task

Asynchronous task

Administration task

Asynchronous direct access



• Components of a VARAN connection







• Cascadable Multi Manager Systems




The VARAN bus, the optimal connection

• Innovative concept for the optimal connection

- Industry-suitable IP20 RJ45 connector plugs

- M12 8-pin for IP67

- 8+4 Power/Ethernet connection technology

• Additional power supply wiring




• M12 8-pin connector plug

- CAT5e certified- Drag chain-suitable cable- Up to 2 A at 24 V




• 8+4 Power/Ethernet connector- CAT5 certified- IP65 and IP67- 2 power supplies with 4 A each at 24 V- 1 power supply for the electronics with 0.5 A at 24 V- 1 release signal, 0.5 A at 24 V




• 8+4 Power/Ethernet connector

Power Interface

Ethernet Interface

Connector Housing

Mounting surface


The VARAN BUS USERORGANIZATION

The VNO


The VARAN BUS USERORGANIZATION

• Founded 2006

• Independent organization

• Machine builders and component manufacturers at one table

• All members have equal say • Cooperation with organizations such as the CiA, for example

• Regular meetings

• Support, maintenance and further development of the standard

VNO, strong together


Example of topology

Optimal Solutions for

Innovative Concepts


Example of topology

Field level

Office/control level

Internet

From the smallest sensor to the World Wide Web

Molding machine

Molding machine

Handling

Handling


Example of topology

Modular machine configuration with central control

Control System

TCP/IPService Level

Service PC

Service PC

Service PC

Service PC

Robot 2Robot 1Molding machine

Conveyer


Example of topology

VARAN bus within the machine

VARAN

Multi Manager

SensorsTempering

IO ModulesService Laptop

Hydraulic Measuring

systems

TCP / IP

TCP / IP

VARAN

TCP / IP

VARAN

DVI

Converter


The VARAN bus in comparison

Comparison


The VARAN bus in comparison

VARAN bus in comparison

Topology

Manager/Client configuration

Safety

Programming/design

Connectionconcept

Communication

Manager/Client with optimized frames

Protocol implemented completely in the hardware

Packets containing errors are repeated in the same bus cycle

Simple system configuration

Certified connector for additional power supply

Asynchronous direct access to clients

Optimized frame configuration

Ring structure vulnerableto disruptions

No burdening of the control CPU

Short "time to market"

Only one connector on periphery devices, minimal wiring requirements, reduction of error sources, Minimization ofcomponent costs

No asynchronousaccess possible

Packets are NOT repeated!

VARAN bus Advantages over: Reason:


Example application

Example application


Example application

• Developed by VAN-RIET, Dutch Material Specialists Handling systems

• 80% production increase as compared to current field bus solution

• Sorts 9.000 packages per hour • Minimum runtime: under 1 ms

• Update time < 200 µs

• Maximum configuration with 128 VARAN digital mixed modules => Corresponds to a maximum of 1024 I/Os networked with the VARAN bus

Package Sorting Facility for TNT Distribution Center


Example application

• Schematic configuration

Package sorting assembly for TNT Distribution Center

(max. 128 VDM)16 x IO digital

Light sensor Spring or pneumatic actuator


Example application

Thank you

Documents

The VARAN BUS