Communicating with S7-300 or S7-400

Introduction

Fernhill SCADA supports these types of connection to Siemens S7-300 and S7-400 PLCs:

Connection Using an MPI Adapter

You can connect Fernhill SCADA to S7-300/400 PLCs using an MPI adapter:

PC connected to two S7-300 PLCs via an MPI adapter

These MPI adapters are supported:

Connection Cables

To connect the MPI adapter to a D-Subminiature 9 pin serial port, typically found on a Personal Computer (PC), a null-modem connection cable with this wiring is required:

MPI Adapter
DE-09 Female Layout
PC
DE-09 Female Layout
RXD23TXD
TXD32RXD
DTR46DSR
GND55GND
DSR64DTR
RTS78CTS
CTS87RTS

Note: All other pins not shown in the above diagram have no connection.

Fernhill SCADA Configuration

For a detailed walkthrough about manually configuring tags for MPI connection refer to Configuring Tags for Siemens S7 MPI Communication.

Connection Using a CP-343-1 or CP-443-1 Ethernet Module

You can connect Fernhill SCADA to an S7-300/400 PLC using a CP-343-1 or CP-443-1 Ethernet module:

PC connected to an S7-300 PLC via Ethernet

For a detailed overview of setting up an S7-300 or S7-400 Ethernet module refer to Siemens S7-300/400 Ethernet Setup Guide.

If the Ethernet module 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 MPI Communication

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

Siemens S7-300/400 Ethernet Setup Guide

For how to configure an S7-300/400 Ethernet module and Fernhill SCADA to work together.

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 definitions of the terms used in Fernhill SCADA.