List of Abbreviations
E-2
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
FC
Function
FEPROM
Flash erasable programmable read only memory
FM
Function module
FOC
Fiber-optic cable
FRCE
Force
GD
Global data communication
I
C
Constant-current lead
ID
Input delay
IFM1F; IFM2F
LED error at interface module 1/2
IM
Interface module
INTF
Error LED “internal fault”
IP
Intelligent periphery
L+
Terminal for 24 VDC supply voltage
LAD
Ladder logic diagram
LWH
Hold last valid value
M
Ground terminal
M+
Measuring lead (positive)
M–
Measuring lead (negative)
M
ANA
Reference potential of the analog measuring circuit
MPI
Multipoint interface
MRES
Master reset
MSM
Mass storage module
MSTR
Master
OB
Organization block
OP
Operator panel
OS
Operator system
PIQ
Process-image output table
PII
Process-image input table
PLC
Programmable logic controller
PG
Programming device
PS
Power supply
Q
I
Analog output current
Q
V
Analog output voltage
RAM
Random access memory
REDF
Redundancy fault
R
L
Load impedance