ABB ret650, Applications Manual

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The LON Protocol
M14804-32 v2
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
M14804-35 v4
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
• The node addresses of the other connected IEDs.
• The network variable selectors to be used.
This is organized by LNT.
The node address is transferred to LNT via the local HMI by setting the parameter
ServicePinMsg = Yes . The node address is sent to LNT via the LON bus, or LNT
can scan the network for new nodes.
The communication speed of the LON bus is set to the default of 1.25 Mbit/s. This
can be changed by LNT.
16.4.2 MULTICMDRCV and MULTICMDSND
SEMOD119881-1 v3
Section 16
1MRK 504 169-UEN A
Station communication
324 Transformer protection RET650 2.2 IEC
Application manual