1.8 USS – Frequency inverter settings
BU 0050 GB-3111 Subject to technical amendments 53
Setting value / Description / Note
USS baud rate
(USS baud rate)
Setting of the transfer rate (transfer speed) via the RS485 interface. All bus participants must
have the same baud rate setting.
0 = 4800 Baud
1 = 9600 Baud
2 = 19200 Baud
3 = 38400 Baud
4 = 57600 Baud (SK 54xE)
5 = 115200 Baud (SK 54xE)
6 = 230400 Baud (SK 54xE)
7 = 460800 Baud (SK 54xE)
NOTE: For communication via Modbus (available for SK 540E and above) a transfer rate of
maximum 38400 Baud must be set.
USS Address
(USS Address)
Setting of the FI bus address for USS (or SK 540E and above: also Modbus) communication.
Telegram downtime
(Telegram downtime)
-0.1 / 0.0 /
0.1 ... 100.0 s
{ 0.0 }
Monitoring function of the active bus interface. Following receipt of a valid telegram, the next one
must arrive within the set period. Otherwise the FI reports an error and switches off with the error
message E010 >Bus Time Out<.
0.0 = Off: Monitoring is switched off.
-0.1 = No error: Even if communication between BusBox and FI is interrupted (e.g. 24V error,
Box removed, etc.), the FI will continue to operate unchanged.
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