TDE MACNO MINIOPD EXP User Manual page 36

2.3.1.1 POWER SOFT START
The bridge rectifier build in the drive may be uncontrolled (diode) or semi-controlled (up to OPEN 40
it is uncontrolled). If the diode bridge is implemented, the power soft start function acts bypassing a
soft start resistor (in series with the output of the power bridge), after the DC Bus Voltage has
charged; otherwise the same function unblocks the semi-controlled input power bridge permitting the
gradual charge of the DC Bus voltage and supplying the drive feeding for the following work.
N.B: It is fundamental to correctly set up the connection C45 build in Power Bridge : 0=
uncontrolled (diode) ; 1 = semi-controlled
The function becomes active if the connection C37=1 and the presence of mains supply voltage
becomes noticed, with the following logic:
Mains supply presence: in case the presence of alternated mains supply voltage becomes noticed
once (at soft start) with the logic power input MAINS_OFF=H, from that moment the control refers
only to the MAINS_OFF to check the mains presence. Otherwise, in the case of drive feeding with a
continuous direct voltage on the DC Bus, it is possible to begin the soft start, even if the measured
voltage on the DC Bus exceeds the indicated value in P97.
Mains break out: the mains break becomes noticed either when the MAINS_OFF signal is
monitored (if this went to the high logic level at least one time during the soft start) either monitoring
directly the DC Bus voltage with minimum threshold setup in P97.
The function of "Soft start enable" may be assigned to one of the logic input thus to enable or disable
the soft start through an external contact.
The power fault alarm (power fault A03), that checks drive over current, insert the soft start limiting
current.
The soft start follows the following criteria
C37
X
X
0
1
1
From default PR.ON=1 and C37=1 thus connecting the drive to the mains supply, the power is
enable immediately with the soft charging of the capacitors.
The soft start charge of the intermediate circuit capacitors lasts a preset time set in P154, after this
time the voltage level is checked to verify the voltage level reached: if this is below the minimum
(P97), the soft start alarm starts.
The drive is not enabled to switch on if soft start function has not ended successfully.
2.3.1.2 VOLTAGE BREAK CONTROL FOR MAINS FEEDING
The mains break control is configurable through the following connections:
Name
MAIN_LOST_SEL
ALL_RST_ON_MAIN
36
A03 Mains Presence
H X
L X
L X
L L
L H
C34 - Managing mains failure
C35 - Automatic alarm reset when mains back on
Soft start enable
OFF
OFF
OFF
OFF
ON
Description
oL10
L
L
L
L
H