Siemens S7-400 ユーザーズマニュアル

3-13

S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07

The power supply modules of the S7-400 indicate module faults and backup
battery faults via LEDs on the front plate.

Table 3-7

Error messages of the power supply modules 

Module fault

INTF

5 VDC

24 VDC

Backup battery fault

Power supplies with 1 backup battery:

BAF

BATTF

Power supplies with 2 backup batteries:

BAF

BATT1F
BATT2F

The following table shows the faults indicated by the INTF, 5 VDC, and 24 VDC
LEDs and lists how to remedy the faults.

The status of the BAF, BATTF, BATT1F, and BATT2F LEDs is not relevant here.

Table 3-8

INTF, DC5V, DC24V LEDs 

D

D

D

Standby switch in        position

Set standby switch to the  

I

  position

Line voltage missing

Check line voltage

Internal fault, power supply module
defective

Replace power supply module

Cutoff after overvoltage on 5 V or illegal
external supply

Disconnect from mains and reconnect
after approximately 1 minute; if
necessary, remove external supply

Power supply module operated in
wrong slot

Install the power supply module in the
correct slot (slot 1)

Short circuit or overload on 5 V

Switch off the power supply module,
remove the source of the short circuit;
after approximately 3 seconds, the
power supply module can be switched
on with the standby switch or via the
power system.*

D

H

D

Overvoltage on 24 V

Check if the supply is external; if not,
replace power supply module