Siemens SIMATIC PG 720, Руководство пользователя

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Glossary-9
PG 720 Programming Device
C79000-G7076-C720-02
Small Computer System Interface. Interface for connecting SCSI devices
(hard disk drives, CD-ROM drives).
Data is transmitted one bit at a time via a serial interface (port); serial
interfaces are therefore slower than parallel interfaces.
A program in which information about the device configuration (that is, the
configuration of the programming device’s hardware) is defined. The device
configuration of the programming device is preset with defaults. Changes
must therefore be entered in the SETUP if a memory extension, new
modules, or a new drive are added to the hardware configuration.
Memory submodules in credit-card format for SIMATIC S5 and SIMATIC S7
which are programmed with the PG 720 and can be plugged in an S5 or S7
programmable controller.
Bus system on the basis of the PROFIBUS standard. Components of the
SIMATIC S5 and S7 series (for example, programming device,
programmable controller, remote I/O) can be networked directly using
SINEC L2.
Bus system on the basis of the ETHERNET standard. Components of the
SIMATIC S5 and S7 series (for example, programming device,
programmable controller, remote I/O) can be networked directly using
SINEC H1 interface modules.
The collective term for all programs which are used on a computer. The
operating system and the user programs are part of the concept “software”.
Super Twist Nematic passive display
The cursor shows where text may be entered, for example, in text editors and
in dialog windows. In many applications the position of the cursor can be
changed by moving and clicking the mouse pointer.
The trackball is used as an input device for programs serviced by a mouse.
On the PG 720, the trackball is integrated in the keyboard.
S
SCSI Interface
Serial Interface
SETUP
SIMATIC Memory
Cards
SINEC L2
SINEC H1
(ETHERNET)
Software
STN Display
T
Text Cursor
Trackball
Glossary