Fernhill SCADA supports these types of connection to Siemens S7-300 and S7-400 PLC Devices:
You can connect Fernhill SCADA to S7-300/400 PLC Devices using an MPI adapter:
These MPI adapters are supported:
The MPI adapter can connect directly to a serial port on a Personal Computer (PC). The serial port on a PC is usually a 9 pin D-subminiature connector. This cable is suitable to connect the MPI Adapter to a computer with a 9 pin D-subminiature connector:
As an alternative you can create your own cable using null-modem wiring:
MPI Adapter![]() |
PC![]() | ||
---|---|---|---|
RXD | 2 | 3 | TXD |
TXD | 3 | 2 | RXD |
DTR | 4 | 6 | DSR |
GND | 5 | 5 | GND |
DSR | 6 | 4 | DTR |
RTS | 7 | 8 | CTS |
CTS | 8 | 7 | RTS |
Note: All other pins not shown in the above diagram have no connection.
RS-232 Speed | Channel Mode |
---|---|
9600 | Baud=9600 Parity=O Data=8 Stop=2 |
19200 | Baud=19200 Parity=O Data=8 Stop=2 |
38400 | Baud=38400 Parity=O Data=8 Stop=2 |
For a detailed walkthrough about manually configuring tags for MPI connection refer to Configuring Tags for Siemens S7 MPI Communication.
You can connect Fernhill SCADA to an S7-300/400 PLC using a CP-343-1 or CP-443-1 Ethernet module:
For a detailed overview of setting up an S7-300 or S7-400 Ethernet module refer to Siemens S7-300/400 Ethernet Connection Guide.
If the Ethernet module configured, you can use the Siemens S7 TCP Autodetect Wizard to try and locate the PLC on the network.
Configuring Tags for Siemens S7 MPI Communication
To learn how to configure tags for Siemens S7 MPI connected PLC Devices.
Siemens S7-300/400 Ethernet Connection 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 PLC Devices and automatically create tags for any PLC Devices found.
For information on the Siemens S7 Driver.
For information about other drivers available in Fernhill SCADA.
For the meaning of terms used in Fernhill SCADA.