Siemens Simatic S7-400 - Manual (Page 97)

Power Supply Modules
3-17
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
BAF, BATT1F, BATT2F
The following table applies to power supply modules with two batteries if the BATT
INDIC switch is in 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 3-10 BAF, BATT1F, BATT2F; BATT INDIC LEDs on 1BATT
LED Cause of Fault Remedy
BAF BATT1F BATT2F
H H D Battery 1 empty or missing
No backup voltage available Insert new battery in
compartment 1.
Press FMR
momentary-contact
pushbutton
D H D Battery 1 empty or missing Insert new battery in
compartment 1.
Press FMR
momentary-contact
pushbutton
Battery has been stored for
too long Depassivate battery
(see Installation Manual,
Chapter 7)
H D D Battery 1 in order
No 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 in order –
D = LED is dark; L = LED lights up;