3 symbols used in this manual, 4 abbreviations used in this manual, Abbreviations – BECKHOFF AX2000 PROFIBUS DP communication profile User Manual
Page 6: Symbols used in this manual, Abbreviations used in this manual, Beckhoff

1.3
Symbols used in this manual
danger to personnel from
electricity and its effects
general warning
general instructions
mechanical hazard
ð
p.
see ... (cross-ref.)
l
special emphasis
1.4
Abbreviations used in this manual
The abbreviations used in this manual are explained in the table below.
Abbrev.
Meaning
AGND
Analog ground
BTB/RTO
Ready to operate
CLK
Clock signal
COM
Serial interface for a PC-AT
DGND
Digital ground
DIN
German Institute for industrial Standards
Disk
Magnetic storage (diskette, hard disk)
EEPROM
Electrically erasable programmable memory
EN
European standard
IEC
International Electrotechnical Commission
INC
Incremental Interface
LED
Light-emitting diode
MB
Megabyte
NI
Zero pulse
NSTOP
Limit-switch input for CCW rotation (left)
PZD
Process data
PSTOP
Limit-switch input for CW rotation (right)
RAM
Volatile memory
RES
Resolver
ROD
A quad B encoder
PLC
Programmable logic controller
SSI
Synchronous serial interface
VAC
AC voltage
VDC
DC voltage
6
PROFIBUS for AX2000/2500
General
12/05
BECKHOFF