Operating instructions

Faults and Alarms Vector Control Chassis Type Frequency Converter
476 869 4070 76 J AB-74 Siemens AG
11-20 Operating Instructions SIMOVERT MASTERDRIVES
Alarm
number
Param.
No.
Bit No.
Cause Counter-measure
A044 r955
11
I too low
Only for synchronous motors
(P095=12) in operation:
The difference smoothed with P159
between excitation current setpoint
and actual value (r160 - r156 )
deviates from zero by more than 25
% of the rated magnetizing current.
Only for synchronous motors P095 = 12
Check:
• Whether the current limitation of the
excitation current control is too small.
• Whether the dynamic performance of
the excitation current injection is too low.
• Whether the excitation current injection
function is operating,
• Whether the wiring of excitation current
actual-value P155 is correct,
• Whether the wiring of excitation current
setpoint r160 is correct,
• Whether there is a wire breakage
between MASTERDRIVES and the
excitation device.
• Whether the voltage limitation is too low
for dynamic excitation current control.
• Whether the analog output for r160
takes place without isolating amplifiers
(despite cable length > 4m).
A045
r955
12
DC braking activated
The DC braking function has been
activated and the motor frequency is
still above the frequency at which DC
braking begins (P398).
• Increase frequency at which DC braking
begins.
A049
r956
0
No slave
At ser. I/O (SCB1 with SCI1/2) no
slave is connected or fiber-optic
cable is interrupted or slaves are
without voltage.
P690 SCI AnaIn Conf
• Check slave.
• Check cable.
A050
r956
1
Slave incorrect
At ser. I/O the slaves required
according to a parameterized
configuration are not present (slave
number or slave type).
Check P690 SCI AnaIn Conf
A051 r956
2
Peer Bdrate
In a peer-to-peer connection, a baud
rate has been selected which is too
high or too different.
Adjust the baud rate in conjunction with the
SCB boards P701 SCom/SCB Baud Rate
A052
r956
3
Peer PcD L
In a peer-to-peer connection, a PcD
length has been set which is too high
(>5).
Reduce number of words
P703 SCom PcD #.
A053
r956
4
Peer Lng f.
In a peer-to-peer connection, the
PcD length of transmitter and
receiver do not match.
Adjust the word length for transmitter and
receiver
P703 SCom/SCB PcD #