Siemens SIMATIC S7-400 Reference Manual page 52

Power supply modules
3.5 Fault/Error messages via LEDs
BAF, BATT1F, BATT2F
The following table applies to power supply modules with two batteries if the BATT.INDIC
switch is set to the 1BATT position. It shows the faults indicated and lists how to remedy the
faults.
Nothing is indicated about the condition of any second battery that may be in use.
Table 3-9
LED
BAF
H
D
H
D
D = LED is dark; H = LED lights up;
BAF, BATT1F, BATT2F
The following table applies to power supply modules with two batteries if the BATT.INDIC
switch is set to the 2BATT position. It shows the faults indicated and lists how to remedy the
faults.
Table 3-10
LED
BAF
H
D
52
BAF, BATT1F, BATT2F, BATT.INDIC LEDs on 1BATT
LED LED
BATT1F BATT2F
H D Battery 1 empty or missing
No external backup voltage
available.
H D Battery 1 empty or missing
External backup voltage avail‐
able.
Battery stored too long.
External backup voltage avail‐
able.
D D Battery 1 OK.
No external backup voltage
available (short-circuit)
D D Battery 1 OK.
External backup voltage avail‐
able.
BAF, BATT1F, BATT2F, BATT.INDIC LEDs on 2BATT
LED LED
BATT1F BATT2F
H H Both batteries are empty or
missing.
No external backup voltage
available
H H Both batteries are empty or
missing.
External backup voltage avail‐
able
Cause of fault
Insert new battery in compartment 1.
Press FMR button.
Insert new battery in compartment 1.
Press FMR button.
Depassivate battery (see
Manual )
● Fault after plugging in a module:
● Fault after switching on: Remove
Cause of fault
Insert new batteries in compart‐
ments 1 and 2 Press FMR button.
Insert new batteries in compart‐
ments 1 and 2 Press FMR button.
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08
Remedy
Installation
Plugged-in module defective
all modules and plug in
individually
-
Remedy