Siemens M7-400 Benutzerhandbuch
Power Supply Modules
3-13
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
A5E00069467-07
3.5
Fault/Error Messages via LEDs
Introduction
The power supply modules of the S7-400 indicate module faults and backup
battery faults via LEDs on the front plate.
battery faults via LEDs on the front plate.
Overview of the Fault/Error Messages
Table 3-7
Error messages of the power supply modules
Type of Fault/Error
LEDs
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
BATT2F
INTF, 5 VDC, 24 VDC
The following table shows the faults indicated by the INTF, 5 VDC, and 24 VDC
LEDs and lists how to remedy the faults.
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
LED
INTF DC5V DC24V
Cause of Fault
Remedy
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
defective
Replace power supply module
Cutoff after overvoltage on 5 V or illegal
external supply
external supply
Disconnect from mains and reconnect
after approximately 1 minute; if
necessary, remove external supply
after approximately 1 minute; if
necessary, remove external supply
Power supply module operated in
wrong slot
wrong slot
Install the power supply module in the
correct slot (slot 1)
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.*
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
replace power supply module