Siemens Simatic M7-400 Reference Manual page 514

Interface Submodules
13.5.2 Addressing and Interrupts
Addressing
The IF 962-LPT interface submodule can be addressed in the following two ways:
• In the AT-compatible I/O address area
• In the M7-300/400-reserved I/O address area (from C000
Addressing in the AT-Compatible I/O Address Area
The LPT ports can be operated in the AT-compatible I/O address area. The
settings are made in the BIOS Setup. You can see the addresses that can be set in
the BIOS Setup from the following table.
Table 13-16
Name
*)
*) The BIOS searches the addresses in the order 03BC
LPT1, LPT2 and LPT3 in ascending order. There is no fixed assignment of the I/O
addresses to LPTx. For example, if only one LPT port is detected at address 0378
will be LPT1.
Note
The LPT port in the M7-400 expansion module MSM 478 is always at the I/O
address 03BC
962-LPT interface submodule if an MSM 478 is in use.
13-18
Addressing the LPT Ports
I/O Address
03BC to 3BE
H
0378 to 37F
)
H H
0278 to 27F
H H
. For this reason, the I/O address 03BC
H
S7-400, M7-400 Programmable Controllers Module Specifications
Remarks
H
Automatically configured by the BIOS and
can be set in the BIOS setup. can be set in the BIOS setup
, 0378 and 0278
H H
must not be set for the IP
H
)
H
and assigns
H
, this
H
A5E00069467-07