Siemens SIMATIC S7-400 Reference Manual page 438

List of abbreviations
E.1 List of abbreviations
Abbreviations
GD
ES
IC
IFM1F; IFM2F
IM
INTF
IP
L+
HLV
FOC
LAD
M
M+
M-
M
ANA
MPI
MRES
MSTR
OB
OP
OS
PIO
PII
PG
PS
Q :
I
Q :
V
RAM
REDF
R :
L
S +
S-
SCL
SFB
SFC
SM
PLC
SSL
TD
SSL
UC
TD
U
CM
438
Global data communication
Sensor supply
Constant-current line
LED error at interface module 1/2
Interface module
Error LED "internal fault"
Intelligent I/O
Terminal for 24 VDC supply voltage
KLV
Fiber-optic cable
Ladder logic diagram
Chassis ground
Measuring line (positive)
Measuring line (negative)
Reference potential of the analog measuring circuit
Multipoint interface
Master reset position of the toggle switch for general reset of the CPU
Master
Organization block
Operator panel
Operator system
Process image of outputs
Process image of inputs
Programming device
Power supply
Analog output current
Analog output voltage
Random access memory
Redundancy fault
Load impedance
Sensing line (positive)
Sensing line (negative)
Structured control language
System function block
System function
Signal module
Programmable logic controller
Signal module
HMI (text display)
Transducer
Universal current
Universal rack
Common mode voltage
Explanations
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08