Lenze 931W - Manual (Page 33)

Software implementation and parameter setting
Service menu
Profibus operation
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33 HB 13.0001-EN 3.0
Bus address
A freely selectable slave address between 2 and 126 can be assigned to each device for
operation on the Profibus. In doing this, it has to be observed that no address is assigned
twice, as this would result in a bus error. Additionally, the bus address that has the highest
priority for the master has to be considered and, where required, has to be altered.
Baud rate
By selecting the baud rate, the user defines the transmission rate of the Profibus DP
interface. For this purpose, the following baud rates are provided:
9.6 k / 19.2 k / 93.75 k / 187.5k / 500 k / 1.5 M bauds
In particular with regard to higher baud rates, a clean bus termination should be observed,
in order to avoid reflections and communication faults resulting therefrom.
Terminal (termination R)
In order to ensure a clean data transmission, at the beginning and end of a bus cable nodes
have to be terminated by means of a resistor, so that no reflections or communication
faults occur on the bus. When selecting this option, a relay in the drive of the terminating
resistor is automatically connected. The status of the relay is maintained even after the
supply voltage is switched off.