Basic Settings For Communication - Siemens SINAMICS G120 Original Instructions Manual

Configuring the fieldbus
7.6 Communication via RS485
7.6.3.1

Basic settings for communication

You set the bus address of the inverter using the
address switches on the Control Unit, using parameter
p2021 with the BOP-2 or in STARTER.
Using parameter p2021 (factory setting: 1) or using
STARTER, you can only set the address, if all address
switches are set to "OFF" (0).
Valid address range: 1 ... 247
If you have specified a valid address using the
address switches, this address will always be the one
that takes effect and parameter p2021 cannot be
changed.
Only addresses in the range 1 ... 127 can be set via the address switches. If you require an
address in the range 128 ... 247, set the address switches to 0 and enter the address using
p2021.
The positions of the address switches are described in Section: Interfaces, connectors,
switches, control terminals, LEDs on the CU (Page 60).
Procedure
To change the bus address, proceed as follows:
1. Set the new address:
– using the address switches
– from an operator panel in parameter p2021
– in STARTER using screen form "Control Unit/Communication/Fieldbus", or using the
2. Switch on the inverter power supply and, if available, the 24 V power supply for the
Control Unit.
3. Switch on the voltages again after all LEDs at the inverter have gone dark.
You have so changed the bus address.
162
expert list in parameter p2021
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG