Siemens M7-400 Benutzerhandbuch

13-18

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

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

H

)

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

Addressing the LPT Ports

03BC

H

 to 3BE

H

*)

0378

H

 to 37F

H

Automatically configured by the BIOS and
can be set in the BIOS setup

)

0278

H

 to 27F

H

can be set in the BIOS setup.

*) The BIOS searches the addresses in the order 03BC

H

, 0378

H

 and 0278

H

 and assigns

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

H

, this

will be LPT1.

The LPT port in the M7-400 expansion module MSM 478 is always at the I/O
address 03BC

. For this reason, the I/O address 03BC

H

 must not be set for the IP

962-LPT interface submodule if an MSM 478 is in use.