Communicating with S7-200

Help Contents

Introduction

Fernhill SCADA supports these types of connection to S7-200 PLCs:

Direct Connection

You can connect Fernhill SCADA directly to an S7-200 PLC using a standard RS-485 adapter:

Fernhill SCADA direct serial connection to an S7-200 PLC

Setup Notes:

Manual Configuration of a Direct Connection

To manually configure Fernhill SCADA for direct connection to an S7-200 PLC:

  1. Create a Siemens S7 PPI Channel Tag
  2. The Mode settings of the Siemens S7 PPI Channel Tag should be configured to: Baud=9600 Parity=E Data=8 Stop=1 Rts=Tg. The Baud=9600 option matches the default baud rate of S7-200 PLCs. The Rts=Tg option tells the serial port hardware to make the RTS signal active during transmit.
  3. Create a Siemens S7 Serial PLC Tag that references the channel.

Connection Using a PPI Adapter

You can connect Fernhill SCADA to S7-200 PLCs using a PPI adapter:

Fernhill SCADA serial connection to an S7-200 PLC using a PPI Adapter

General Setup Notes:

Manual Configuration of a Connection using a PPI Adapter

To manually configure Fernhill SCADA for connection to S7-200 PLCs using a PPI adapter:

  1. Create a Siemens S7 PPI Channel Tag
  2. The Mode settings of the Siemens S7 PPI Channel Tag should match the setup of the adapter. See the tables below for the appropriate Mode settings and adapter switch settings
  3. Create a Siemens S7 Serial PLC Tag that references the channel.

Setup Notes for 6ES7 901-3CB30-0XA0:

Setup Notes for 6ES7 901-3BF21-0XA0:

Ethernet Connection using a CP 243-1 Module

You can connect Fernhill SCADA to an S7-200 PLC using an Ethernet module:

Fernhill SCADA ethernet connection to an S7-200 PLC using an Ethernet communications module

Fernhill SCADA supports these S7-200 Ethernet modules:

For a detailed overview of setting up an S7-200 Ethernet module refer to Siemens S7-200 Ethernet Connection Guide.

If the S7-200 module is configured, you can use the Siemens S7 TCP Autodetect Wizard to try and locate the PLC on the network.

Further Information

Configuring Tags for Siemens S7 PPI Communication

For a step by step guide to configuring tags for Siemens S7 PPI connected PLCs.

Siemens S7-200 Ethernet Connection Guide

For how to configure an S7-200 Ethernet module and Fernhill SCADA to work together.

Siemens S7 PPI Autodetect Wizard

For how to search COM ports for Siemens S7 PLCs and automatically create tags for any PLCs found.

Siemens S7 TCP Autodetect Wizard

For how to search a network for Siemens S7 PLCs and automatically create tags for any PLCs found.

Siemens S7 Driver

For information on the Siemens S7 Driver.

Fernhill SCADA Drivers

For information about other drivers available in Fernhill SCADA.

Glossary

For the meaning of terms used in Fernhill SCADA.