Siemens Simatic S7-400 User Manual
Page 510
Interface Submodules
13-14
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Table 13-13
Meaning of the Addressing Type Bits in the Configuration Register
(IF 962-COM)
I/O Address
Addressing Type COM b/a
I/O Address
Bit 6/2
Bit 5/1
Bit 4/0
Addressing only possible in the reserved I/O address area
(from C000
H
) (default)
0
0
0
280
H
0
0
1
2E8
H
0
1
0
2F8
H
0
1
1
380
H
1
0
0
3E8
H
1
0
1
3F8
H
1
1
0
0
1
1
1
Note
The AT-compatible I/O address can only be set once for each COM port of an
automation computer (including those permanently installed in a programmable
module).
COM Ports
The COM ports (COMa and COMb) of the UART 16C552 can be addressed from
offset addresses 10
H
or 18
H
in accordance with component specification 16C552.
Data Formats
The following data formats can be set in the IF 962-COM interface submodule:
Data bits:
5 bits, 6 bits, 7 bits, 8 bits
Parity:
Even, odd, disable
Stop bit:
1 bit, 1.5 bits, 2 bits
Transmission Speed
The following transmission speeds (transmission rates) can be set in the
IF962-COM interface submodule:
AT-compatible transmission speeds and transmission speeds up to 115.2 Kbps.
Note
Please note that a safe level of transmission speed depends on factors such as
cable length, cable type, and environmental interference.