Siemens SINAMICS GM150, Operating And Installation Instructions, Page: 123 / 258

Switching the bus terminating resistor on and off
1. Activate the bus terminating resistor at the two ends of the bus line.
2. Deactivate the bus terminating resistor at all other connectors.
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Figure 7-8 Position of the bus terminating resistors
Note
Switch the bus terminating resistor on or off depending on its position on the bus, otherwise
the data will not be transmitted properly.
7.2.4 Setting the PROFIBUS address switches
Set the PROFIBUS address of the CU320 Control Unit for the PROFIBUS communication.
You have several options for setting the PROFIBUS address:
● Parameter p0918 (default setting)
– Parameter p0918 can be used to set the PROFIBUS address only when the address is
set to 0 or 127 using the DIP switches. Set all switches S1 to S7 to ON or OFF (default
setting). If the address is changed, the new setting does not become effective until the
CU320 Control Unit is switched on.
– The set PROFIBUS address is saved by means of the "Copy RAM to ROM" function.
● Using the DIP switches on the CU320 Control Unit
Move switches S1 to S7 to the required position to set the PROFIBUS address.
Switch
S1 2
0
0 1
S2 2
1
= 2
S3 2
2
= 4
S4 2
3
= 8
S5 2
4
= 16
S6 2
5
= 32
S7 2
6
= 64
Start-up
7.2 Description and configuration of the PROFIBUS interface
SINAMICS GM150 6SL3815-2LN41-4AA2
Operating Instructions 04/2017
123