The Lon Protocol; Hardware And Software Modules - ABB rec670 Commissioning Manual

Section 7
Establishing connection and verifying the LON communication
7.2.1
7.2.2
62
The fibre optic LON bus is implemented using either glass core or plastic core fibre
optic cables.
Table 11: Specification of the fibre optic connectors
Cable connector
Cable diameter
Max. cable length
Wavelength
Transmitted power
Receiver sensitivity

The LON Protocol

The LON protocol is specified in the LonTalkProtocol Specification Version 3 from
Echelon Corporation. This protocol is designed for communication in control
networks and is a peer-to-peer protocol where all the devices connected to the network
can communicate with each other directly. For more information of the bay-to-bay
communication, refer to the section Multiple command function.

Hardware and software modules

The hardware needed for applying LON communication depends on the application,
but one very central unit needed is the LON Star Coupler and optical fibres connecting
the star coupler to the IEDs. To interface the IEDs from the MicroSCADA with
Classic Monitor, application library LIB520 is required.
The HV Control 670 software module is included in the LIB520 high-voltage process
package, which is a part of the Application Software Library in MicroSCADA
applications.
The HV Control 670 software module is used for control functions in the IEDs. The
module contains a process picture, dialogues and a tool to generate a process database
for the control application in MicroSCADA.
When using MicroSCADA Monitor Pro instead of the Classic Monitor, SA LIB is
used together with 670 series Object Type files.
The HV Control 670 software module and 670 series Object Type
files are used with both 650 and 670 series IEDs.
Use the LON Network Tool (LNT) to set the LON communication. This is a software
tool applied as one node on the LON bus. To communicate via LON, the IEDs need
to know
Glass fibre
ST-connector
62.5/125 m
1000 m
820-900 nm
-13 dBm (HFBR-1414)
-24 dBm (HFBR-2412)
1MRK 511 360-UEN A
Plastic fibre
snap-in connector
1 mm
10 m
660 nm
-13 dBm (HFBR-1521)
-20 dBm (HFBR-2521)
Bay control REC670 2.1 IEC
Commissioning manual