BR-Automation Automation PC 820, Руководство пользователя

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Appendix A • Glossary
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ix A
235 Automation PC 820 User's Manual V 1.00
SDRAM
An abbreviation for " S ynchronous D ynamic R andom A ccess M emory". A construction of
dynamic semiconductor components (DRAM) that can operate with higher clock rates than
conventional DRAM switching circuits. This is made possible using block access. For each
access, the DRAM determines the next memory addresses to be accessed.
SFC
Sequential function chart > Graphic input language for PLCs used to represent sequential
control.
Special keypad module
The following keypad modules are offered by B&R: Dummy module, emergency stop module,
key switch module (made up of 1 key switch and 1 on /off switch) and a start/stop module (made
up of 2 buttons and a label field).
Slot PLC
PC insert card that has full PLC functionality. On the PC, it is coupled via a DPR with the process
using a fieldbus connection. It is programmed externally or using the host PC.
SoftPLC
Synonym for SoftPLC.
SRAM
An abbreviation for " S tatic R andom A ccess M emory". A semiconductor memory (RAM) made up
of certain logic circuits (flip-flop) that only keeps stored information while powered. In computers,
static RAM is generally only used for cache memory.
Standard keypad module
The following keypad modules are offered by B&R: 16 keys with 16 LEDs, 12+4 keys with 4
LEDs, 8 keys with 4 LEDs and a label field and 4 keys with 4 LEDs and 4 label fields.
SUXGA
Abbreviation for S uper U ltra E xtended G raphics A rray; Generally a screen resolution of 2048 ×
1536 pixels (4:3). An alternative name is QXGA ( Q uad E x tended G raphics A rray), which is 4x
the pixel resolution of XGA.
SVGA
Abbreviation for » S uper V ideo G raphics A rray«; Graphics standard with a resolution of at least
800×600 pixels and at least 256 colors.
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