02.00 Faults / Alarms
SIEMENS AG 6RX1700-0AD76 10-11
SIMOREG DC Master Operating Instructions
Fault Description
No.
Cause as a function of fault value
(r047.001, r949.001 or r949.009 with acknowledged error)
Further information (r047.002 to r047.016)
F042 Tachometer fault
(active in operating states of – –, I, II)
A check is performed every 20ms to ensure that
(K0287) EMF Actual
(K0179) speedActual
is > +5%
If the check result is incorrect for 4 times in succession, the fault message is activated.
The following rule applies:
100% actual speed = maximum speed
100% actual EMF = ideal average DC voltage at
α ≥ 0, i.e. when the thyristor bridge is fully gated
The ideal DC voltage average value at
α = 0 is
23
P078.001
∗
∗
The monitoring function is effective only if the EMF > a % of
23
P078.001
∗
∗
"a" is a percentage that can be set in parameter P357 (default setting 10%).
The monitoring function is effective only if the armature current is > 2% of the converter rated DC current set in r072.002.
Possible fault causes
• Open circuit in tachometer or pulse encoder cable.
• Tachometer of pulse encoder cable incorrectly connected.
• Pulse encoder supply has failed.
• Polarity for actual speed value (P743) is incorrectly set.
• Armature circuit data (P110 und P111) are incorrectly set (execute current controller optimization run).
• Tachometer or pulse encoder defective
• Pulse encoder supply voltage is incorrectly set (P140)
• The field polarity is not reversed by the external hardware when the field is reversed.
Fault value: r047 Index 002 to 016:
1 Open circuit in tachometer or pulse encoder cable i002 Actual speed value (K0179) in case of fault
2 Polarity of tachometer or pulse encoder is incorrect i003 Actual EMF value (K0287) in case of fault
F043 EMF too high for braking operation
(active in operating states of – –, I, II)
This fault message is activated if the following 5 conditions are fulfilled when a torque direction reversal is requested (selection
of MI or MII):
• P272=0 (fault message is parameterized and not alarm + field weakening)
• A parameterized, additional, torque-free interval (P160 ≠ 0) has expired
• Parallel drive is ready for engagement of the new torque direction
• The absolute value of the armature current (K0118) requested in the new torque direction is >0.5% of P072
• The calculated firing angle (K0101) for the armature current requested for the new torque direction is >165 degrees.
Possible fault causes
• No “speed-dependent field weakening" (P081=0) is parameterized even though operation in the field weakening range is
needed for the requested maximum speed
Note:
In motor operation, it is possible to reach EMF values corresponding to the peak of the phase-to-phase supply voltage at a
firing angle of α
G
=30° (rectifier stability limit P150) and low armature currents.
• Setpoint EMF for field weakening operation too high (parameter P101 is set too high)
• Supply voltage dip
• EMF controller or field current controller is not optimized, possibly resulting in excessive EMF on power-up.
Fault value: r047 Index 002 to 016:
Calculated firing angle (armature) before limitation (K0101) i002 Instantaneously measured actual EMF (K0287)
i003 Armature current controller setpoint (K0118)
F044 A slave connected to the paralleling interface is not operating
(active when U800 = 1 or 2 and U806>10 (master) after receipt of the first valid protocol in operating states – –, I, II)
Fault value:
1 A fault message is active on a slave
2 A slave is not in operation (e.g. because its enable input is set to "0")
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