Stream SCADA can communicate to PLC and other devices that support Siemens S7 TCP communication. The following PLCs are supported:

  • S7-200
  • S7-300
  • S7-400
  • S7-1200
  • S7-1500

From Stream Explorer, select Data Sources and click on the Add button.

Main Tab:

  • Name: Unique name for the data source.
  • Description: Optional information about the data source.
  • Protocol: Selecting one of the Siemens S7 PLCs.
  • Cycle: This is the scan rate for this data source.

  • IP address: Type here the IP address of the Siemens S7 PLC.

Note: If you have more than one IP address (redundant), type them separated with semi column. Example:;

  • Port No.: Device port number.  
  • Rack: Enter rack number.
  • Slot: Enter CPU slot number.
  • Timeout: Configures operation or socket time-out
  • Retry: Configures the automatic retry setting. A value of 0 disables any automatic retries.
  • Status Tag: Select or type a Boolean tag name that will become True only when if the device comm status is healthy.

Special settings for S7-200

  • TSAP (Local): Must match the related setting in CPU configuration.
  • TSAP (Remote): Must match the related setting in CPU configuration.

The next step is to add Tags and link them to this data source. See Siemens Addressing.