Siemens SIMATIC S7-200 - Modem Settings Required for a 10-Bit Modem; Pin Assignments for a 25-Pin to 9-Pin Adapter

Setting Up Communications Hardware and Network Communications
7-24
S7-200 Programmable Controller System Manual
A5E00066097-02
This configuration allows only one master device and one slave device. In this
configuration, the S7-200 controller requires one start bit, eight data bits, no parity
bit, one stop bit, asynchronous communication, and a transmission speed of
9600/19,200 baud. The modem requires the settings listed in Table 7-3. Figure
7-18 shows the pin assignments for a 25-pin to 9-pin Adapter.
Table 7-3 Modem Settings Required for a 10-Bit Modem
Modem
Data Format
in Bits
Transmission
Speed between
Modem and PC
Transmission
Speed on
the Line
Other Features
8 data Ignore DTR signal
10-Bit
1 start
9600 baud
19 200 baud
9600 baud
19 200 baud
No hardware flow
control
10 Bit
1 stop
19,200 baud 19,200 baud
No software flow
tl
no parity
control
25-Pin to 9-Pin Adapter
PC/PPI cable
25-pin
9-pin
2
3
4
2
3
7
75
Figure 7-18 Pin Assignments for a 25-Pin to 9-Pin Adapter