Saia-Burgess Controls AG
Hardware manual for PCD3 series │ Document 26-789 ENG19│ 2018-06-29
Appendix
A
A-8
Glossary
RAM
Random Access Memory → digital, volatile RAM of the computer.
Loses its data in the off state.
Resources
Resources → Inputs/outputs, flag, register, counter, timer, etc.
Restore
Load saved data from the backup data carrier.
RIO
Remote Input Output → Inputs/outputs on module carriers that
can be accessed by the CPU via profibus/ethernet lines.
ROM
Read only memory → Digital memory which keeps its data in the
off state.
SD card
Secure Digital Memory Card → Digital memory which keeps its
data in the off state.
Sink operation
Ground switching with DC
Slot
Slot for I/O, communication and memory modules.
Source operation
Plus switching with DC
Source text or source code
With an ASCII editor created (original) program, therefore no
word processing program.
Word processing programs include characters for bold text etc.,
which a compiler might misinterpret.
SPM
Saia PG5
®
Project Manager, main program of the Saia PG5
®
software package.
SRAM
Static Random Access Memory
SuperCap
Electronic component (capacitor) that can store electrical energy.
Preservation of memory contents and clock function after
switching off the power supply for a few hours to days.
Terminated
Electrical reflections at the line ends are prevented using
termination (e.g. with terminating resistors).