Siemens SINAMICS G120 - Basic Settings for Communication

Configuring the fieldbus
7.6 Communication via RS485
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
173
7.6.4.1
Basic settings for communication
Setting the address
You set the MAC address of the inverter using
the address switches on the Control Unit, using
parameter p2021 or in STARTER.
Valid address range:
0 … 127.
For address 0, the inverter responds to a
broadcast.
If you have specified a valid address ≠
0 using
the address switches, this address will always be
the one that takes effect and parameter p2021
cannot be changed.
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
expert list in parameter p2021
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.
Additional settings
P no.
Parameter name
p0015 = 21
Drive device macro
Select the I/O configuration (USS fieldbus)
p0791[0 … 1]
Fieldbus analog outputs
Parameter to interconnect the analog outputs for control via the fieldbus
p2030 = 5
Fieldbus telegram selection
5: BACnet
p2020
Baud rate
Factory setting = 9600 bit/s