
Power supply modules
3.5 Fault/Error messages via LEDs
S7-400 Automation System Module Data
Reference Manual, Edition 09/2009, A5E00850736-06
63
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 BAF, BATT1F, BATT2F, BATT.INDIC LEDs on 1BATT
LED
BAF
LED
BATT1F
LED
BATT2F
Cause of fault Remedy
H H D Battery 1 empty or missing
No external backup voltage
available.
Insert new battery in
compartment 1. Press FMR button.
Battery 1 empty or missing
External backup voltage
available.
Insert new battery in
compartment 1. Press FMR button.
D H D
Battery stored too long.
External backup voltage
available.
Depassivate battery (see
Installation Manual
)
H D D Battery 1 OK.
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 Battery 1 OK.
External backup voltage
available.
-
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 BAF, BATT1F, BATT2F, BATT.INDIC LEDs on 2BATT
LED
BAF
LED
BATT1F
LED
BATT2F
Cause of fault Remedy
H H H Both batteries are empty or
missing.
No external backup voltage
available
Insert new batteries in
compartments 1 and 2 Press FMR
button.
D H H Both batteries are empty or
missing.
External backup voltage
available
Insert new batteries in
compartments 1 and 2 Press FMR
button.
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