ABB RET 54 Series Technical Reference Manual, General page 71

1MRS755225 Transformer Terminal
Technical Reference Manual, General
connector inhibits the rear X3.3 SPA communication and the transparent SPA communication on the
LON protocol and remains inhibited for one minute after the SPA communication has stopped. It is
possible to release this blocking situation by writing the value 1 to the V202 variable.
LON
Adjustable LON serial communication parameters are Subnet number, Node
number and Bit rate.
Parameter
Subnet number 1...255
Node number 1...127
Bit rate 78.1; 1250 kbps
The bit rate 1250 kbps on the LON protocol is used for the optical serial
communication network using the RER 103 module connected to the X3.3
connector.
Value Default
1
1
1250
RET 54_
Explanation
LON subnet number
LON node number
LON communication speed
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