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Siemens SIMATIC S7-400H - Table 6- 3 LED Patterns

Siemens SIMATIC S7-400H
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Special functions of a CPU 41x-H
6.3 Resetting the CPU to the factory state
S7-400H
82 System Manual, 03/2012, A5E00267695-11
LED patterns during CPU reset
While you are resetting the CPU to its factory settings, the LEDs light up consecutively in the
following LED patterns:
Table 6- 3 LED patterns
LED LED pattern 1 LED pattern 2 LED pattern 3
INTF Flashes at 0.5 Hz Flashes at 0.5 Hz Lit
EXTF Dark Dark Dark
BUSxF Dark Dark Dark
FORCE Flashes at 0.5 Hz Dark Dark
MAINT Dark Dark Dark
IFMxF Dark Dark Dark
RUN Flashes at 0.5 Hz Dark Dark
STOP Flashes at 0.5 Hz Dark Dark

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