What should you watch out for when setting up a connection between a WinCC flexible PC Runtime and an S7-200 via an RS232/PPI cable?

Description:
Below is a descriptions of the settings you must make for a connection between WinCC flexible PC Runtime and an S7-200 CPU via the serial RS232/PPI cable.
 

No.	Procedure
1	Create a new connection for an S7-200 in the tree under "Connections" in WinCC flexible. Check that the settings for the interface are set to MPI/DP. Set the baud rate to 19200 (or 9600; the baud rate 187.5k is not supported). Set the network profile to PPI (MPI is possible, for example, if you have more than one connection). ( 18 KB ) Fig. 01
2	In addition to the settings in the project, you must also set the PG/PC interface on the PC with WinCC flexible Runtime. In the Control Panel you open the "Set PG/PC Interface" dialog.
3	The "Set PG/PC interface" dialog opens. Fig. 02 Check that the following settings are made here: Access point of the application: "S7ONLINE" Interface parameters used: PC/PPI cable
4	Now click on the Properties button. The "Properties - PC/PPI cable" dialog opens and the "PPI" tab is selected. Fig. 03 Check that the following settings are made here: Advanced PPI is deselected Multi Master network is deselected Transfer rate 19.2kbps (must correspond to setting of WinCC flexible)
5	Then select the "Local Connection" tab. Fig. 04 Here you set the serial interface you are using for communication.
6	Now acknowledge all the open windows of the "PG/PC Interface" with "OK".
7	On the RS232/PPI cable you must also set the DIP switches. A description is available in Entry ID 16532946. For the example shown here with the properties set above: Baud rate 19200 No Multi Master network PPI protocol you set all the DIP switches to "0" except DIP switch 3.

Keywords:
COM port; COM interface, serial interface, Micro Automation, HMI