Siemens M7-400 Benutzerhandbuch

3-18

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

The following table applies to power supply modules with two batteries if the BATT
INDIC switch is in the 2BATT position. It shows the faults indicated and lists how to
remedy the faults.

Table 3-11

BAF, BATT1F, BATT2F; BATT INDIC LEDs on 2BATT

H

H

H

Both batteries are empty or
missing.
No backup voltage available

Insert new batteries in compartments 1
and 2
Press FMR momentary-contact
pushbutton

D

H

H

Both batteries empty or missing

Insert new batteries in compartments 1
and 2
Press FMR momentary-contact
pushbutton

H

H

D

Battery 1 empty or missing

Insert new battery in compartment 1.
Press FMR momentary-contact
pushbutton

No backup voltage available
(short circuit or overload)

•

Fault after plugging in a module:
Plugged-in module defective

•

Fault after switching on: Remove all
modules and plug in individually

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

H

Battery 2 empty or missing

Insert new battery in compartment 2.
Press FMR momentary-contact
pushbutton

No backup voltage available
(short-circuit or overload)

•

Fault after plugging in a module:
Plugged-in module defective

•

Fault after switching on: Remove all
modules and plug in individually

D

D

H

Battery 2 empty or missing

Insert new battery in compartment 2.
Press FMR momentary-contact
pushbutton

Battery has been stored for too
long

Depassivate battery 
(see Installation Manual, Chapter 7)

H

D

D

Both batteries 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

Both batteries in order.

–

D = LED is dark;  L = LED lights up;