Siemens SIMATIC S7 System Manual page 455

For "Found CPUs" (CPUs located on your local network), use the "Communications" dialog
to connect with your CPU:
● Click the "Communication Interface" dropdown list, and select "PC/PPI cable.PPI.1" for
your RS485 network.
● Click the "Find CPUs" button to display all operational CPUs ("Found CPUs") on the
RS485 network. All CPUs default their RS485 network settings to address 2 and
9.6 Kbps.
● Highlight a CPU, and then click "OK".
Note
You can open multiple copies of STEP 7-Micro/WIN SMART on a computer. Be aware that
when you open a second copy of STEP 7-Micro/WIN SMART or use the "Find CPUs" button
in either copy, the communication connection to the CPU in your first/other copy of
STEP 7-Micro/WIN SMART might be disconnected.
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
Communication
8.6 RS485
455