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Module
Modules are boards (printed circuit boards) which can be plugged into
a programmable logic controller or programming device. They are
available, for instance, as central controller modules, interface
modules, or as bulk memory modules.
Monitor
The monitor or screen is a visual display unit via which the
programming device communicates with the user.
Mother Board
The mother board is the core of the programming device. From here
data are processed and stored, interfaces and device I/Os are
controlled and managed.
Mouse
The mouse is a pointing device with which the user inputs coordinates
(x,y). By moving the mouse, the mouse pointer can be moved at will
around the screen. By pressing the left mouse button, the position is
marked. The other mouse keys may have different assignments
according to the application. With the mouse, objects can be selected,
menus processed, and functions started.
Mouse Pointer
The mouse pointer is moved across the worktop (screen) by means of
the mouse. The mouse pointer selects, for example, objects which are
to be processed.
The multipoint interface (MPI) is the programming device interface of
MPI/DP
SIMATIC S7. It permits the simultaneous operation of several
programming devices, text displays, and operator panels on one or
more central processing units. The stations on the MPI are connected
together via a bus system.
MS-DOS
(Microsoft Disk Operating System) is one of the standard operating
systems for personal computers.
N
Network
Link between programming devices and programmable controllers by
means of interface modules, physical cables, and the corresponding
software to allow data exchange between the devices.
PG 720 PII Programming Device
C79000-G7076-C756-02
Glossary
Glossary-7
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