Siemens SINAMICS G150 Manual page 1444

4 Faults and alarms
4.2 List of faults and alarms
20:
For the specified pulse amplitude, the measured pulse response is much higher than the expected value.
Possible causes:
- Strong oscillations have occurred.
- The motor is short-circuited for high frequencies (output filter).
- The motor is damaged.
Remedy: For fault value = 0:
Once the pulse technique has been de-selected automatically (p1750.5 = 0), there are two possible options:
- acknowledge the fault and save parameter p1750.5 = 0 -> field-oriented control mode to standstill is not used and
replaced by transition to open-loop control at low speeds.
- upgrade the power unit firmware (at least V4.3) -> field-oriented control mode to standstill is available.
For fault value = 10:
With active selection of the pulse technique (p1750.5 = 1):
- POWER ON (switch-off/switch-on) the Control Unit and the power unit together again.
or
- carry out a manual warm restart (p0009 = 30, p0976 = 2, 3).
If this does not solve the problem: Replace the power unit component.
For fault value = 20:
- control parameters might have been adjusted (factory setting, commissioning).
- filters must not be connected between motor and converter/inverter.
- check the motor.
F07422 Drive: Reference model natural frequency > Shannon frequency
Message value: -
Message class: Error in the parameterization / configuration / commissioning procedure (18)
Drive object: VECTOR_G
Reaction: NONE (OFF1, OFF2, OFF3)
Acknowledge: IMMEDIATELY (POWER ON)
Cause: The natural filter frequency of the PT2 element for the reference model (p1433) is greater than the Shannon
frequency.
The Shannon frequency is calculated according to the following formula: 0.5 / p0115[1]
Remedy: - reduce the natural frequency of PT2 element for reference model (p1433).
- reduce the speed controller sampling time (p0115[1]).
F07426 (A) Technology controller actual value limited
Message value: %1
Message class: Application / technological function faulted (17)
Drive object: VECTOR_G
Reaction: OFF1 (IASC/DCBRK, NONE, OFF2, OFF3)
Acknowledge: IMMEDIATELY
Cause: The actual value for the technology controller, interconnected via connector input p2264, has reached a limit.
Fault value (r0949, interpret decimal):
1: upper limit reached.
2: lower limit reached.
Remedy: - adapt the limits to the signal level (p2267, p2268).
- Check the actual value normalization (p0595, p0596).
- Deactivate evaluation of the limits (p2252 bit 3)
See also: p0595 (Technological unit selection), p0596 (Technological unit reference quantity), p2264 (Technology
controller actual value), p2267 (Technology controller upper limit actual value), p2268 (Technology controller lower
limit actual value)
Reaction upon A: NONE
Acknowl. upon A: NONE
1444
SINAMICS G130/G150
List Manual (LH2), 04/2014, A5E03263479A