Siemens S7-400PLC Spécifications Page 64

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Power supply modules
3.5 Fault/Error messages via LEDs
S7-400 Automation System Module Data
64 Reference Manual, Edition 09/2009, A5E00850736-06
LED
BAF
LED
BATT1F
LED
BATT2F
Cause of fault Remedy
H H D Battery 1 empty or missing
No external backup voltage
available (short-circuit or
overload)
Insert new battery in
compartment 1. Press FMR button.
Fault after plugging in a module:
Plugged-in module defective
Fault after switching on:
Remove all modules and plug in
individually
Battery 1 empty or missing Insert new batteries in
compartments 1 and 2 Press FMR
button.
D H D
Battery has been stored for
too long
External backup voltage
available
Depassivate battery (see
Installation Manual
).
H D H Battery 2 empty or missing
No external backup voltage
available (short-circuit or
overload)
Insert new battery in
compartment 2. Press FMR button.
Fault after plugging in a module:
Plugged-in module defective
Fault after switching on:
Remove all modules and plug in
individually
Battery 2 empty or missing Insert new batteries in
compartments 1 and 2 Press FMR
button.
D D H
Battery has been stored for
too long
External backup voltage
available
Depassivate battery (see
Installation Manual
).
H D D Both batteries in order.
No external backup voltage
available (short-circuit)
Fault after plugging in a module:
Plugged-in module defective
Fault after switching on:
Remove all modules and plug in
individually
D D D Both batteries in order.
External backup voltage
available
-
D = LED is dark; H = LED lights up;
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