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Glossary
MS-DOS
Microsoft Disk Operating System is one of the standard operating systems for per-
sonal computers. It is a single-user system.
Multipoint Interface
The multipoint interface (MPI) is the programming device interface of SIMATIC
S7/M7. It enables access to programmable modules, text displays, and operator
panels from a central point. The stations on the MPI can communicate with each
other.
N
Network
Link between PGs or PCs and programmable controllers by means of interface
modules, physical cables, and the corresponding software to allow data exchange
between the devices.
O
OP
Operator Panels serve as a quick way to control machines. Expected values can
be set, machine data called up, or plants created.
Operating System
Collective term for all programs which, in conjunction with the hardware, control
and monitor execution of the user programs, the distribution of resources among
the individual user programs, and the maintenance of the operating mode (for
example, Windows Me).
P
Parallel Interface
Information is transmitted a byte at a time via a parallel interface (port). This
means that the transmission rate is very fast. The PGs or PCs have a parallel in-
terface (LPT) to connect a printer.
Glossary-10
SIMATIC Box PC 840 Manual
A5E00085984-04

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