09.02 Fault and Alarm Messages
Siemens AG 6SE7087-6AK85-1AA0
7-5
Rectifier/Regenerating Unit Operating Instructions
Fault
No.
Fault description
Fault
value
Meaning Possible causes
Countermeasures
F048 RAM Fault
RAM defective
Software-based checking of the
functionality of the RAM chips on the CUR
module
- - - RAM defective (replace the CUR
module)
F049 Watchdog!
Watchdog timer has triggered a Reset
An internal hardware counter in the
microprocessor checks to see whether the
program for calculating the firing pulses is
executed at least about every 400 ms (on
average, it is executed every 2.7 to 3.3
ms). If this is not the case, the counter
triggers a Reset. F047 then appears.
- - - CUR module defective
- Excessive interference (e.g. by
contactors without RC elements,
unshielded cables, faulty
shielding connections)
F060 No MLFB
P070=0
- - - After acknowledging in
BOOTSTRAP, enter a suitable
parameter value for the unit with
P070 MLFB (6SEE70..) (only
possible with the corresponding
access stages of the two access
parameters; see Section 4.3.9.2).
F061 WrongPar Set
Parameter wrong or not yet set
3 P141 (Rectifier Induct.), P143
(Inverter Induct.) or P144 (C of DC
link) are = 0.00
- Carry out circuit identification
(P052 = 21)
Note about fault value 4, 5:
The U
d
reduction is then considered to be
"selected" if while the basic setting
P571.i001 ≠ 0 active
or while the standby
setting P571.i002 ≠ 0 active
, or if P323=1.
4 P318 is too large (with U
d
reduction
selected) or P776 is set too small
to facilitate constant regenerative
operation with continuous
DC link
current for the current ratio of
rectifier/regenerating supply
voltage.
As the inverter step limit P776 with
respect to the commutation
duration (depending on u
K
value of
the network) has an upper limit,
P318 has to be set lower, or U
d
reduction has to be activated via
P571if it is not currently active.
The following must apply:
cosP776100%
U
U
P318
rect. Supply,
reg. Supply,
≤
or.
if operating without U
d
reduction:
cosP776100%
U
U
100%
rect. Supply,
reg. Supply,
≤
5 P318 is too large (with U
d
reduction
selected) to facilitate constant
regenerative operation with
pulsating
DC link current for the
current ratio of
rectifier/regenerating supply
voltage.
P318 has to be set lower, or U
d
reduction has to be activated via
P571if it is not currently active.
The following must apply:
%62,87
U
U
P318
rectifier Supply,
ngregenerati supply,
≤
or
if operating without U
d
reduction:
%62,78
U
U
100%
rectifier Supply,
ngregenerati Supply,
≤
Autotransformer connected incorrectly 6
1,1
1
<
U
U
rectifier Supply,
ngregenerati Supply,
7
P076 ≠ 0xx UND Unit is an E unit
(P070 ≥ 101)
- Set P076 correctly
8 P076 = 10x, 20x or 21x
(i.e. more parallel recovery power
sections are parameterized than
parallel feed power sections)
- Set P076 correctly
F065 SST1 Telegr.
USS telegram to SST1 failed
Active from the first reception of a valid
protocol in all operating states
Following receipt of a valid telegram, no
further telegrams were received for longer
than the time set with parameter
P687.i001
- - - Cable break
- Fault in the USS master
AoteWell Automation Sales Team
Buy Siemens PLC HMI Drives at AoteWell.com
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