PROGRAMMING GUIDE
SINUS PENTA
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A044 SW Overcurrent
A044
Description
SW Overcurrent
Event
Immediate current limit tripped
Possible
cause
•
Abrupt variations of the connected load
•
Output short-circuit or ground short-circuit
•
Strong electromagnetic disturbance or radiated interference.
If alarm
A044
tripped while accelerating:
•
Too short acceleration ramp;
If alarm
A044
tripped while decelerating:
•
Too short deceleration ramp.
•
Excessive gain of the current regulator (
P155
) or too short integral time (
P156
)
when using the
FOC
control algorithm.
•
Excessive gain of the speed regulator (
P128
) or too short integral time (
P126
)
when using the
VTC
control algorithm.
Solution
1. Check if the drive and the motor are properly dimensioned with respect to the
connected load.
2. Make sure that no output short-circuit is to be found between two phases or
between one phase and the grounding (terminals
U, V, W
). (Remove voltage from
the motor, set IFD control and operate the drive in no-load conditions.)
3. Check if the command signals are sent to the drive using screened cables where
required (see Sinus Penta’s Installation Guide). Detect external sources for
electromagnetic disturbance, check wiring and make sure that antidisturbance
filters are installed on the coils of contactors and electrovalves (if fitted inside the
cabinet).
4 If necessary, set longer acceleration times (see the RAMPS MENU).
5 If necessary, set longer deceleration times (see the RAMPS MENU).
6. If necessary, decrease the values set in the LIMITS MENU.
A045 Bypass Circuit Fault
A045
Description
Bypass precharge Fault
Event
The drive forced to close its relay or contactor for the short-circuit of the precharge
resistors in DC-link capacitors (DC bus), but it did not detect the relevant closing
signal while precharging.
See also
A046
.
Possible
cause
•
Disconnection of auxiliary signal.
•
Precharge relay/contactor failure.
Solution
1. Reset the alarm: send a
RESET
command.
2. If the alarm persists, please contact ELETTRONICA SANTERNO’s Customer
Service.
