Siemens Sinumerik 840D sl Programming Manual page 141

DSB Decoding Single Block: Decoding single block
DW Data word
DCE Data transmission equipment
E Input
I/O Input/output
I/R Infeed/regenerative feedback unit (power supply) on the SIMODRIVE 611(D)
EIA code Special punched-tape code, number of holes per character always odd
ENC Encoder: Actual value encoder
EPROM Erasable Programmable Read Only Memory: Erasable, electrically programmable read-only memory
FB Function block
FC Function Call: Function block in the PLC
FDB Product database
FDD Floppy Disk Drive: Diskette drive
FEPROM Flash-EPROM: Read and write memory
FIFO First In First Out: Memory that works without address specification and whose data is read in the
same order in which it is stored.
FM Function module
FM-NC Function Module - Numerical Control
FPU Floating Point Unit: Floating Point Unit
FRA Frame block
FRAME Data block (FRAME)
CRC Cutter radius compensation (tool radius compensation)
ISO Milling
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
Abbreviations
141