Siemens SINAMICS G120 - Connecting Inverter to CAN Bus; Setting the Node ID and Baud Rate

Configuring the fieldbus
7.7 Communication over CANopen
Inverter with CU230P-2 Control Units
220 Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
7.7.3.1
Connecting inverter to CAN bus
Connect the converter to the fieldbus via the 9-pin SUB-D pin connector.
The connections of this pin connector are short-circuit proof and isolated. If the converter
forms the first or last slave in the CANopen network, then you must switch-in the bus-
terminating resistor.
For additional information on the SUB-D pin connector and on the bus-terminating resistor,
please refer to Section Interfaces, connectors, switches, control terminals, LEDs on the CU
(Page 60).
7.7.3.2
Setting the node ID and baud rate
Setting the node ID
You set the node ID of the inverter using the address
switches on the Control Unit, using parameter p8620
or in STARTER.
Valid address range:
1 … 127
If you have specified a valid node ID using the
address switches, this node ID will always be the o
ne
that takes effect, and parameter p8620 (factory
setting: 0) will not be able to 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 address using one of the subsequently listed options:
– using the address switches
– with an operator panel using p8620
– in STARTER using screen form "Control Unit/Communication/Fieldbus", or using the
expert list with p8620
2. Switch on the inverter power supply and, if being used, the 24 V supply for the Control
Unit.
3. Switch on the voltages again after all LEDs at the inverter have gone dark.
This means that you have changed the bus address.