Weq CTW900, Руководство пользователя

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Faults and Alarms .
CTW900 | 25
Fault/Alarm Description Possible Causes
F067:
Incorrect Polarity of the
Tacho or Encoder ■ Actuates when the polarity of the feedback by DC tacho or
encoder is different from the output voltage signal (EMF).
Note: This fault will be active only if the converter is configured
as Antiparallel (P0298=1) and the feedback is not set for EMF
(P0202
 0).
It is also possible to disable the protection setting P0352=1.
■ Wiring of the tacho or encoder cables
inverted.
F070:
Field Overcurrent ■ Actuates when the field circuit current remains above the value
defined in P0359 (in percentage of P0404) for over 2 seconds.
( ) = (100
% + 0359) × 0404
■ Field regulator gains too high (P0175 and
P0176).
■ Overcurrent level set too low (P0359).
F071:
Armature Overcurrent ■ Actuates when the armature circuit current remains above the
value defined in P0135 for over 2 seconds.
■ Current regulator gains too high (P0167
and P0171).
■ Maximum output current set too low
(P0135).
■ Fault on some of the thiristors of the
armature.
F072:
Motor Overload ■ Actuates when the output current exceeds the limit defined in
P0156 for a period longer than the setting in P0158.
Note: In case the output current is below the value of P0156, but
above the value of P0157, the actuation time will be give by:
072
( ) = ( 0156 ÷ 0003)
× 0158
■ Settings of P0156, P0157 and P0158
too low for the load used.
■ Overload on the motor shaft.
F074:
Field Missing
■
Actuates when field current remains below the value defined in
P0177 for a period longer than the time set in P0356.
■
Motor field not connected.
■ Field input fuses open.
■
Setting of P0177 incompatible with the
motor field.
■ Fault in the field supply when supplied
externally by means of connector X3.
F077:
Motor Stalled ■ Actuates when the armature current remains above the limit
defined in P0355 (in percentage of P0295) and speed below
P0139 for a period longer than the time set in P0137.
( ) = 0355
× 0295
Note: If P0355 is set for 0, the protection will be disabled.
■ Motor shaft locked.
■ Incorrect settings of P0355 and/or
P0139.
F079:
Fault in the Encoder
Signals ■ Actuates when a fault in the encoder pulses occurs. ■ Wiring between the encoder and
interface accessory broken.
■ Encoder defective.
F080:
CPU Fault (Watchdog)
■
Actuation of the microcontroller watchdog timer.
■
Electric noise.
■ Converter not grounded.
F082:
Copy Function Fault
■
Actuates when a fault in the copy of parameters by the keypad
(HMI) occurs.
■
Attempt to copy parameters from the
keypad (HMI) to a converter with a different
software version.
F084:
Self-Diagnose Fault
■
Actuates when an internal fault is detected on the converter.
■
Defect on the internal circuits of the
product.
■ Accessory modules poorly connected.
A088:
Communication with
keypad (HMI) Fault
■ Signals when the communication between the keypad (HMI)
and the control board is interrupted.
■ Poor contact on the keypad (HMI) cable.
■ Electric noise on the installation.
A090:
External Alarm ■ Signals an external alarm through a digital input (DI).
Note: It is necessary to set some DI for "Without External Alarm”
■ Digital input set for “Without External
Alarm” is open (0V).
F091:
External Fault ■ Actuates when some digital input set for “Without External
Fault” is open.
■ Digital input set for “Without External
Fault” is open (0V).
F098:
Invalid Offset Ia/If ■ Actuates when the measurement circuit of the armature
current (Ia) or field current (If) displays an abnormal value during
the converter initialization.
■ Defect on the measurement circuits of
armature current or field current.
F099:
Invalid Offset Ua/Tacho
■
Actuates when the measurement circuit of the armature
voltage (Ua) or tacho voltage displays an abnormal value during
the converter initialization.
■
Power-up of the converter with the
motor running.
■ Defect on the measurement circuits of
armature or tacho voltage.
A128:
Serial Communication
Timeout
■
Signals when the converter stops receiving valid telegrams
within a certain period.
Note: It may be disable by setting P0314 = 0.0s.
■
Poor installation of the communication
and/or ground cables.
■ Master sending new telegrams in a
period longer than the setting in P0314.