P-n-P Field Bus

DEVICENET Since the introduction in 1994 this CAN variant has become very popular. Like the other fieldbus solutions, DeviceNet is available as an integrated option for the VLT 2800 and VLT 5000 Series.

Cyclic I/O communication

• Acyclic communication – “explicit messaging”
• UCMM messages are integrated (class 4 device)
• EDS-file for easy configuring
• Bus concept provides fieldbus voltage supply
• Fulfilment of DeviceNet AC/DC motor profile
• Protocol defined in accordance with the Open DeviceNet Vendor Association (ODVA)
• Transmission rate uo to 500 kBaud
• Up to 64 station on one single DeviceNet
  

LONWORKS

The American company of Echelon introduced LonWorks in 1990. It is based on the “Neuron” Chip and originally it was intended for building process control, sensors and actuators. However, it can be found on a multitude of industrial application. LonWorks is a true decentralized and independent option as it does not need a master.

Danfoss offers a LonWorks Option for both the VLT 5000 and VLT 6000 HVAC series.

• 78 kBaud, 1.25 Mbaud, Free Topology connection
• Communication via Standard Network Variable Types (SNVT)
• Access to XIF file makes the planning easy
• No Master required
  

MODBUS PLUS

The Modbus Plus is based on the Modbus Protocol from the company of Modicon (AEG), Modbus and Modbus Plus can be combined over the so-called Bridge Multiplexer.

The Modbus Plus option is available for VLT 5000

• Transmission rate 1 Mbaud
• Peer-to-peer communication
• No configuration file required
• Global Data transfer
• Up to 64 stations on one Network
  

METASYS

Metasys N2 is a proprietary protocol of Johnson Controls. However, Johnson Controls has opened their protocol to others. The Metasys N2 protocol is incorporated into VLT 6000 HVAC as a standard feature. It is also possible to select the FC Protocol or FLN. Serial communication is directly established between the Johnson Metasys building management system and the VLT 6000’s RS 485 port. Metasys provides unlimited read and write capabilities to all VLT parameters.

• Max. 9600 Baud
• Built-in as standard in the VLT 6000 HVAC, parameter selectable

FLN

The FLN (Floor Level Network) protocol is a proprietary protocol of Siemens Building Automation Landis & Staefa Division (previous Landis & Staefa). FLN is incorporated as standard in the VLT 6000 HVAC. It is also possible to select the FC protocol and Metasys N2. Serial communication is directly established between the Landis & Staefa System 600 building management system and the VLT 6000’s RS 485 port. Communication capabilities are limited to 99 predetermined data points.

• Max. 9600 Baud
• Built-in as standard in the VLT 6000 HVAC, parameter selectable
  

FC protocol (standard RS 485)

An RS 485 interface is standard on all Danfoss VLT frequency converters. Over this interface it is possible to have 126 units in one network. The build-up of the FC protocol is very simple and is described in the VLT frequency converter Design Guide. If the speed of data transmission of secondary importance the RS 485 interface is a good alternative to the more expensive but fast fieldbus solutions.

• Max. 9600 Baud
• Up to 126 units in one network
• Standard interface on all Danfoss VLT frequency converters
  

PROFIBUS

This open, non-proprietary fieldbus standard complying with EN 50170 has become the most idely used industrial fieldbus concept on a world-wide basis.
All Danfoss VLT frequency converters, VLT 2800 Series, VLT 5000 Series, VLT 6000 HVAC and the VLT DriveMotor are available with PROFIBUS DP as an option (VLT 5000 is also available with PROFIBUS FMS).

• Simple two-wire connection
• A universal product of high global acceptance
• Compliance with the international standard of EM 50170
• Communication speed of up to 12 Mbaud (3 Mbaud for VLT 2800 and VLT DriveMotor)
• Fulfilment of PROFIDRIVE guideline
• All VLT frequency converters with Profibus are certified by the Profibus organisation
  

INTERBUS

This is also an open, non-proprietary standard. It complies with the EN 50254 standard. Using the VLT 5000 fitted with an option card, it is possible to connect directly to an INTERBUS remote network.

• Easy connection
• Compliance with the international standard of EN 50254
• Universal product of high acceptance
• I/O based transmission principle, high protocol efficiency
• Unified planning tool (e.g. CMD software
• INTERBUS option is certified by the Frauenhofer Institut
• In addtion the Gateway IB-S/DP for Danfoss VLT frequency converters allows the use of other VLT types on an INTERBUS network. BY means of the Gateway it is possible to operate up to 14 VLT frequency converters of different series