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Siemens S7 Driver

The Siemens S7 driver supports the S7-200, S7-300, S7-400, S7-1200, S7-1500 and Ethernet LOGO! range of PLCs. The driver supports both serial and ethernet connections.


Ethernet connection to S7-200 PLCs is supported via the CP-243-1 module.

Serial connection to S7-200 PLCs can be direct, or via a PPI adapter (6ES7 901-3BF21-0XA0, 6ES7 901-3CB30-0XA0 or equivalent).

S7-300 and S7-400

Ethernet connection is supported via the CP-343-1 or CP-443-1 Ethernet modules.

Serial connection is supported via:


The Ethernet port on the S7-1200 PLC allows direct connection.


Ethernet connection is supported to Ethernet versions of the LOGO! PLC (OBA7 and OBA8).

Data Types

The Siemens S7 driver supports these data types: Inputs, Outputs, Flags, and Data Blocks.

This driver can synchronize the PLC clock to the computer running Fernhill SCADA.

For further information see Siemens S7 Driver Reference in the online documentation.