Siemens SIMATIC S7-200 - Capabilities of S7-200 and EM 277 Module; Data Communications Using the CP or MPI Card; From What Point Do I Set up Communications?

Setting Up Communications Hardware and Network Communications
7-4
S7-200 Programmable Controller System Manual
A5E00066097-02
Table 7-2 Capabilities of S7-200 and EM 277 Module
Connection
Port
Baud Rate
Supported
Number of
Logical
Connections
Protocols Supported
S7-200 CPU
Port 0 9.6 kbaud
Port 1 19.2 kbaud
187.5 kbaud
187.5 kbaud
4 on each port
PPI, MPI, and PROFIBUS
EM 277 PROFIBUS-DP Module
Up to 2 per
CPU
9.6 kbaud to
12 Mbaud
6 on each module MPI and PROFIBUS
Data Communications Using the CP or MPI 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 7-1.
The specific card and protocol are set up using the PG/PC Interface from within
STEP 7-Micro/WIN 32. See Section 7.3. When using Windows 95, Windows 98, or
Windows NT, you can select any protocol (PPI, MPI, or PROFIBUS) to be used
with any of the network cards.
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 7-2.
For more information on the communications processor cards, see the SIMATIC
Components for Totally Integrated Automation Catalog ST 70 .
From What Point Do I Set Up Communications?
You can set up communications from the following points in Windows 95,
Windows 98, or Windows NT 4.0:
• During the final step of the installation of your STEP 7-Micro/WIN 32 software
• Within STEP 7-Micro/WIN 32