Technical data

CU230P-2 Control Units, Getting Started
A5E02484096, 05/2009
9
PROFIBUS DP cable connector and permissible cable lengths
For connecting the SINAMICS G120 inverter, we recommend the following PROFIBUS DP cable connectors:
● 6GK1 500-0FC00
● 6GK1 500-0EA02
They are equipped with a switch through which the bus terminating resistor can be connected.
Permissible cable lengths
The permissible cable lengths are dependent on the baud rate and the PROFIBUS cable. For further information, please
referto: (http://support.automation.siemens.com/WW/view/en/22698508)
Note
Communication with the controller, even when the line voltage is switched off
You will have to supply the Control Unit with 24 V DC on terminals 31 and 32 if you require communication to take place with
the controller when the line voltage is switched off.
Setting the PROFIBUS DP address
Before the PROFIBUS DP interface is used, the address of the node point (inverter) must be set.
The following methods are available for setting the PROFIBUS DP address:
● Using the address switch on the Control Unit
● Using parameter p0918
Note
Important notes for setting the PROFIBUS address
The address setting on the DIP switch takes priority over the p0918 settings.
The PROFIBUS DP address can only be set using p0918 when the address 0 is set on the DIP switches of the Control
Unit (factory setting). When the address switch is set to a value ≠ 0, the setting in p0918 is ignored.
Valid address range for Siemens controllers: 1 … 125.
Arrangement of the DIP switches on the Control Unit and address examples
The arrangement and the values of the individual DIP switches to set the Profibus address are provided in "
Interfaces,
connectors, control terminals and LEDs on the CU (Page
3)
Note
A
newly set PROFIBUS DP address will only come into effect after switching off and on again. It is particularly important that
any external 24 V supply is switched off.