Data Communications Using The Mpi Or Cp Card - Siemens Simatic S7-200 System Manual

9.4

Data Communications Using the MPI or CP Card

Siemens offers several network interface cards that you can put into a personal computer or
SIMATIC programming device. These cards allow the PC or SIMATIC programming device to
act as a network master. These cards contain dedicated hardware to assist the PC or
programming device in managing a multiple-master network, and can support different
protocols at several baud rates. See Table 9-9.
Table 9-9
Name
Short AT ISA
or built into
programming programming
MPI
MPI
device
Short AT ISA
CP 5411
PCMCIA,
type II
CP 5511
Plug and Play
hardware
Short PCI
CP 5611
Plug and Play
hardware
1
At 9600 baud or 19,200 baud only
The specific card and protocol are set up using the PG/PC Interface from within
STEP 7-Micro/WIN or from the Windows Control Panel. See Section 3.3.
When using Windows 95 or Windows NT, you can select any protocol (PPI, MPI, or
PROFIBUS) to be used with any of the network cards. As a general rule, you should select
PPI protocol at 9600 baud or 19200 baud when communicating to S7-200 CPUs. The only
exception is the CPU 215. When communicating to this CPU by means of the DP port, you
must select MPI protocol. The CPU 215 DP port supports baud rates from 9600 baud to
12 Mbaud. This port determines the baud rate of the master (CP or MPI card) automatically
and synchronizes itself to use that baud rate.
Each card provides a single RS-485 port for connection to the PROFIBUS network. The
CP 5511 PCMCIA card has an adapter that provides the 9-pin D port. You connect one end
of an MPI cable to the RS-485 port of the card and connect the other end to a programming
port connector on your network. See Figure 9-8. For more information on the
communications processor cards, see the SIMATIC Components for Totally Integrated
Automation Catalog ST 70 .
S7-200 Programmable Controller System Manual
C79000-G7076-C230-02
Network Communications and the S7-200 CPU
Cards for Connecting to a Multiple-Master Network
Type Operating
Systems
Supported
MS-DOS
Windows 3.1x
Windows 95
Windows NT
Windows 95
Windows NT
Windows 95
Windows NT
Windows 95
Windows NT
Comments
Supports PPI protocol, 9600 baud and
19,200 baud
1
Supports PPI, MPI, and PROFIBUS-DP
protocols, 9600 baud to 1.5 Mbaud for PCs and
programming devices
1
Supports PPI, MPI, and PROFIBUS-DP
protocols, 9600 baud to 12 Mbaud for PCs and
programming devices
1
Supports PPI, MPI, and PROFIBUS-DP
protocols, 9600 baud to 12 Mbaud for notebook
PCs
1
Supports PPI, MPI, and PROFIBUS-DP
protocols, 9600 baud to 12 Mbaud for PCs
9-13