Siemens Simatic M7-400 Reference Manual page 492

M7-400 Expansions
12.4 MSM 478 Mass Storage Module;
(6ES7 478-2BA00-0AC0)
Characteristics
The MSM 478 mass storage module is used for storing programs and larger
quantities of data. It also has an AT-compatible parallel port (LPT).
The MSM 478 mass storage module has the following function units:
• One 3.5''/1.44-Mbyte floppy disk drive
• One hard disk drive with a capacity of ≥ 516 x 10
• One AT-compatible parallel port LPT1
The MSM 478 mass storage module has a 120-pin connector on the left-hand side
and a 120-pin socket on the right-hand side for connecting further expansion
modules.
Figure 12-10 MSM 478 Mass Storage Module
System Integration BIOS Setup
So that the BIOS of your CPU 486-3, CPU 488-3, or your FM 456 can correctly
access the diskette and the hard disk, you must make some settings in the BIOS
setup of your CPU/FM.
To learn how to make these settings, see the "BIOS setup" section of the module
description.
12-22
6
bytes
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07