Siemens PC 670 manual Using the Computing Unit in a Simatic S7 Network MPI/DP, Connection

Connecting and Switching on the Computing Unit Release 04/02

3.8Using the Computing Unit in a SIMATIC S7 Network (MPI/DP)

Connecting an S7 PLC via the MPI/DP interface

Using the potential isolated*) MPI/DP interface, the computing unit can be connected to a SIMATIC S7 PLC or a PROFIBUS network. Using the MPI connection cable (5 m) for connection to the SIMATIC S7 CPUs (Order

No.: 6ES7901-0BF00-0AA0), only transmission rates of up to 187.5 Kbit/s are possible. For baud rates from 1.5 Mbit/s, the PROFIBUS 12 Mbit/s (Order No. 6ES7901-4BD00-0XA0) connection cable is necessary.

	In interference environment:
	Bus connector
	6ES7972-0BB10-0XA0
	or
	6ES7972-0BB20-0XA0
MPI/DP Interface	6ES7901-0BF00-0AA0
	(5 m long)

Figure 3-11 Connection Using the MPI/DP Interface

To connect the computing unit to a SIMATIC S7 programmable controller, perform the following steps:

1.Disconnect the computing unit from the mains power supply.

2.Plug the connecting cable onto the MPI/DP interface

Caution

!Danger of damage being caused to the device

Before inserting the connecting cables, the static charge of your body, the device and the connecting cables must be brought to the same potential. To do this, touch the metal housing briefly.

*) Potential isolation within the SELV circuit.

Connection

Using the MPI/DP interface, it is possible to connect PCs with:

SMPI networks (S7 200, S7 300 and S7 400) or

SPROFIBUS-DP networks (DP components).

3-22 Panel PC 670 Computing Unit, Equipment Manual