Mounting and connecting 
  3.3 Connecting the HMI device 
Basic Panels 
Operating Instructions, 04/2012, A5E02421799-03 
43 
Configuring the PC/PPI cable 
Configure the transmission speed using the DIP switches of the PC/PPI cable if using the 
PC/PPI cable to interconnect the HMI device with the configuring PC. 
 
 
Note 
Set a lower bit rate if the connection is lost during the operating system update. If you use a 
higher bit rate, you must use the PC/PPI cable release 3 or higher. The version code is 
printed on the cable ("E stand 3," for example, corresponds to release 3). 
 
 
 
Set the DIP switches 1 to 3 to the same 
value as in WinCC flexible or WinCC. 
DIP switches 4 to 8 must be set to "0". 
In the figure, the bit rate is set to 
115.2 kbps. 
You can set the following bit rates: 
 
Bit rate in kbps  DIP switch 1  DIP switch 2  DIP switch 3 
115.2  1  1  0 
57.6  1  1  1 
38.4  0  0  0 
19.2  0  0  1 
9.6  0  1  0 
4.8  0  1  1 
2.4  1  0  0 
1.2  1  0  1