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Entry type: FAQ Entry ID: 24072800, Entry date: 02/18/2017
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MICROMASTER 4 (MM4), SINAMICS G110 / G120 (CU 2x0x): RS232 / USB Adapter

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My PG/PC has only USB ports. How can I go online to my inverter using USS protocol?

If your PC/PG only has USB interfaces instead of the RS232 interface, you can use standard USB<->RS232 converters. Please make sure that you use up-to-date drivers from the respective manufacturers, particularly also for 64-Bit-Systems.

Note
If data transfer rate problems occur, then the min. baud rate should be set to 38400.

Settings

Drive Monitor Interface COM1 - COM4 A COM port number can be selected between 1-4 (dependent on the PC setting).
Baud rate 9600 or higher A higher baud rate might give the better access; e.g. 38400 Baud
Bus operation RS485 Automatic mode Online operation is not possible without this setting
 
STARTER Access point DEVICE(STARTER, SCOUT) --> PC COM-Port (USS)  
Interface Parameter Assignment Used PC COM-Port (USS)  
Interface COM1 - COM7 A COM port number can be selected between 1-7 (dependent on the PC setting).
Baud rate 9600 or higher A higher baud rate might give the better access; e.g. 38400 Baud
RS485 Automatic mode Online operation without this setting is not possible
 
Device Manager Ports (COM & LPT) USB<->RS232-Adapter E.g. ATEN USB to Serial Bridge (COM4)
Properties of the Port:
Bits per second 9600   Leave the presetting's
Data bits 8
Parity None
Stop bits 1
Flow control None
COM Port Number The COM port number can be modified between 1-7 when required

Information
Further information about interface settings you will find in the attached pdf-file.   24072800_FAQ-DEE6B7DF_USB-RS232_converter_en.pdf (760,2 KB) 

Security information
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https://www.siemens.com/cybersecurity#Ouraspiration.