Table 2-1 Leds Of The Cpus - Siemens SIMATIC S7-400 Manual

Structure of a CPU 41x
2.1 Control and display elements of the CPUs
LEDs
The table below gives you an overview of the LEDs on the individual CPUs.
Table 2-1 LEDs of the CPUs
LED Color
INTF Red
EXTF Red
FRCE Yellow
MAINT
RUN Green
STOP Yellow
BUS1F Red
BUS5F Red
IFM1F Red
Mode Selector Switch
You can use the mode selector switch to set the current mode of the CPU. The mode
selector is a three-position toggle switch.
Memory Card Slot
You can insert a memory card into this slot.
There are two types of memory cards:
● RAM cards
● Flash cards
Slot for Interface Modules
You can insert one PROFIBUS DP module for the CPU 41x-3 and CPU 41x-4 in this slot.
2-2
Meaning
Internal fault
External fault
Force job active
Not assigned
RUN mode
STOP mode
Bus fault on MPI/PROFIBUS DP
interface 1
Features of the PROFINET interface
Fault on interface module 1
You can expand CPU load memory with the RAM card.
The flash card is non-volatile storage for storing your user program and data (no backup
battery necessary). You can program the flash card either on the programming device or
in the CPU. The flash card also expands the load memory of the CPU.
Exists on CPU
414-3 PN/DP
416-3 PN/DP
416F-3 PN/DP
x
x
x
x
x
x
x
x
x
S7-400 Automation System, CPU Specifications
Manual, 10/2006, 6ES7498-8AA04-8BA0