Siemens Simatic M7-400 Reference Manual page 515

Example of Setting an AT-Compatible I/O Address
In the following example, the I/O address 0278
Proceed as follows to do this:
1. Select the "IF Modules" page in the BIOS setup.
2. Enter the submodule receptacle number of the interface submodule in "Select
Module #".
3. Enter the offset address for the configuration register of the interface submodule
"00 " at "Config.Index".
H
4. Enter "FE
register (see also Table 13-20).
5. Press the OK button.
Addressing in the M7-300/400-Reserved I/O Address Area
Regardless of possible addresses in the AT-compatible I/O address area, the
IF 962-COM interface submodule can be addressed in this reserved address area.
The base address depends on the interface submodule slot in the expansion
module or the programmable module. See the descriptions "M7-300 Expansions",
"M7-400 Expansions" or the description of the M7-400 programmable modules for
the slot-dependent base address of the interface submodule.
The I/O address is the sum of the base address and the offset address.
The registers and their meanings and the offset addresses are described below.
Table 13-17
Offset
Address
00
H
10 - 17
H H
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
" or "02 " at "Value". This value is then written into the configuration
H H
Offset Address Assignments for the IF 962-LPT Interface Submodule
Function
Configuration register
UART 16C552 parallel port
Interface Submodules
is to be set in the BIOS setup.
H
Remarks
Read/write
Read/write
13-19