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 C000H) (default) 000
280H001
2E8H010
2F8H011
380H100
3E8H101
3F8H110
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 10H or 18H 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.