Siemens Simatic S7-400 User Manual

Special functions of a CPU 41x
3.4 Resetting the CPU to the factory state
S7-400 Automation System, CPU Specifications
3-12 Manual, 10/2006, 6ES7498-8AA04-8BA0
LED Patterns during CPU Reset
While you are resetting the CPU to the factory state, the LEDs light up consecutively in the
following LED patterns:
Table 3-2 LED patterns
LED LED pattern 1 LED pattern 2 LED pattern 3
INTF F 0.5 Hz F 0.5 Hz H
EXTF D D D
BUSxF D D D
FORCE F 0.5 Hz D D
IFMxF D D D
RUN F 0.5 Hz D D
STOP F 0.5 Hz D D
D = LED is dark; L = LED lights up; F = LED flashing with the specified frequency

Siemens Simatic S7-400 Specifications

General

Programming Language	STEP 7 (LAD, FBD, STL, SCL, GRAPH)
Communication Interfaces	MPI, PROFIBUS
Power Supply	24 V DC, 120/230 V AC (Power supply modules are separate and chosen based on system requirements)
Operating Temperature	0°C to 60°C
Mounting	Rack mounting
Processor	CPU 412-1, CPU 414-2, CPU 416-2, CPU 417-4 (Different CPUs offer varying performance and features)
Relative Humidity	5 to 95% (non-condensing)