S5-115F Manual
System Startup
Figure 4-11. Startup of an S5-115F in Safety Mode
Are
the red LEDs off
and the green
LEDs on?
yes
Plug in memory
submodules
Start
yes
no
Are
the green LEDs
on the PS 951
lit?
Switch on the supply
voltages of both subunits
within 60 sec.
Replace power supply
module
CPU overall reset
possible (Caution, 4.1.6)
no
Are
the STOP LED
and the BASP
LED lit?
Replace CPU
yes
yes
yes
no
no
no
Are
the green and red
LEDs lit (approx.
2 min.)?
Green LED flashes?
Switch mode selector of
subunit A from STOP to
RUN
Use COM 115F to
display error
Use COM 115F to error
Use COM 115F to error
PLC operating
faultlessly
Switch mode selector of
subunit B from STOP to
RUN
EWA 4NEB 811 6148-02
4-17