Siemens SIMATIC PG 720 P Manual page 117

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.
MPI/DP
The multipoint interface (MPI) is the programming device interface of
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. It is a single-user system and is supplied installed on
all our programming devices.
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.
O
Operating System
Collective term for all functions 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, MS-DOS).
PG 720 P Programming Device
C79000-G7076-C721-02
Glossary
Glossary-7