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Section 7
Establishing connection and verifying the LON communication
7.2.1
7.2.2
60
An optical network can be used within the substation automation system. This enables
communication with the IEDs through the LON bus from the operator's workplace, from
the control center and also from other IEDs via bay-to-bay horizontal communication.
The fibre optic LON bus is implemented using either glass core or plastic core fibre optic
cables.
Table 10:
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.
Glass fibre
ST-connector
62.5/125 m
1000 m
820-900 nm
-13 dBm (HFBR-1414)
-24 dBm (HFBR-2412)
1MRK 511 366-UUS -
Plastic fibre
snap-in connector
1 mm
10 m
660 nm
-13 dBm (HFBR-1521)
-20 dBm (HFBR-2521)
Commissioning manual
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