Siemens S7-400 Installation Manual page 302

Glossary
M
Mass Storage Module
An expansion of the M7-400 programmable controller. It is connected to the CPU
via an ISA bus interface and contains a floppy disk drive and a hard disk drive.
Measuring Range Submodule
Measuring range submodules are plugged onto the analog input module for
adapting to various measuring ranges.
Memory Card
Memory cards are storage media in credit-card format for CPUs and CPs. They are
available as RAM or FEPROM.
Mode Selector Switch
³ Keyswitch
Module Parameters
Module parameters are used to set the module reactions. A difference is made
between static and dynamic module parameters.
Multipoint Interface (MPI)
The multipoint interface is the programming device interface in SIMATIC S7/M7. It
enables the simultaneous operation of a number of nodes (programming devices,
text display operator interfaces, and operator panels) from one or more CPUs.
Each node is identified by an address (MPI address).
MPI Address
³ Multipoint Interface (MPI)
N
Nesting Depth
A block can be called from another block by means of block calls. The nesting
depth is the number of simultaneously called logic blocks.
Glossary-10
S7-400 and M7-400 Programmable Controllers Hardware and Installation
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