Siemens Sinamics S110 Function Manual page 454

Communication PROFIBUS DP
9.2 Communication via PROFIBUS DP
Note
The factory settings are "ON" or "OFF" for all switches. With these two settings, the
PROFIBUS address is set by parameterization.
Parameter p0918 is unique to the Control Unit (see Control Unit). The factory setting is 126.
Address 126 is used for commissioning. Permitted PROFIBUS addresses are 1 ... 126.
If more than one CU is connected to a PROFIBUS line, the address settings must differ from
the factory settings. Note that each address can only be assigned once on a PROFIBUS
line. This can be achieved using the address switch or by adjustable parameter p0918
accordingly. The setting can be made by connecting the 24 V supply step by step and
resetting p0918, for example.
The address setting on the switch is displayed in r2057.
Each change made to the bus address is not effective until POWER ON.
Device master file
A device master file provides a full and clear description of the features of a PROFIBUS
slave.
The GSD files can be found at the following locations:
● On the CD for the STARTER commissioning tool
Device identification
An identification parameter for individual slaves facilitates diagnostics and provides an
overview of the nodes on the PROFIBUS.
The information for each slave is stored in the following CU-specific parameter:
r0964[0...6] device identification
Bus terminating resistor and shielding
Reliable data transmission via PROFIBUS depends, amongst other things, on the setting for
the bus terminating resistors and the shielding for the PROFIBUS cables.
● Bus terminating resistor
● Shielding for the PROFIBUS cables
454
Order no. 6SL3072-0AA00-0AGx
The bus terminating resistors in the PROFIBUS plugs must be set as follows:
– First and last nodes in the line: switch on terminating resistor
– Other nodes in the line: switch off terminating resistor
The cable shield in the plug must be connected at both ends with the greatest possible
surface area.
References: SINAMICS S110 Equipment Manual
Function Manual, 10/2008, 6SL3097-4AB10-0BP0
Drive functions