A
03.04 Appendix
Abbreviations
FM
Function Module
FM-NC
Function module – numerical control
FPU
Floating Point Unit
FRA
Frame block
FRAME
Data record (frame)
FST
Feed stop
FUP
Function plan (PLC programming method)
GP
Basic Program
GUD
Global user data
HEX
Abbreviation for hexadecimal number
HD
Hard disk
HHU
Handheld unit
HMI
Human Machine Interface
HMS
High-resolution Measuring System
HSK
Horizontal softkey
HPU
Handheld programming unit
HT
Handheld Terminal: Programming device (see PD)
HW
Hardware
I
Input
IBN
Startup
IF
Drive module pulse enable
IK (GD)
Implicit communication (global data)
Siemens AG, 2004. All rights reserved.
SINUMERIK 840D/840Di/810D Operator’s Guide Handheld Terminal 6 (BAH) - 03.04 Edition A-137
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