ID 442426.04 186WE KEEP THINGS MOVING
Drive controller
9
Manual SD6
9.5.1.3 Display
Parameter E03 indicates the voltage applied in the DC link.
Parameter E18 indicates whether the charge relay is closed. When the power
input is turned on, the charge relay remains open initially (0:inactive). The
charge relay closes (1:active), when the DC link is charged.
DC link connection (peak value).
State of the internal charge relay. Active means that the relay contact is closed
and the charge resistors are bypassed from the network to the DC link. When
the supply voltage is turned on, the charge relay remains open initially. It closes
when the DC link is charged through the charge resistors.
Level of the thermal brake resistor model (i
2
t model). 100 % is equivalent to full
utilization. Braking resistance data is defined with A21 ... A23. Fault
"42:tempBrakeRes" is triggered at over 100 %.
The DC link voltage is continuously monitored. The largest value measured is
saved here in non-volatile memory. This value can be reset with A37.
The energy dissipated through the braking resistor (in watt-hours) is saved
here in non-volatile memory. This value can be reset with A37.
9.5.2 Brake resistor
If the voltage in the DC link of the drive controller increases to impermissible
values, for example due to generative feedback from the motor into the drive
controller, the drive controller switches to device state Fault with event 36:high
voltage. One solution to prevent this from happening is to convert the
superfluous energy in the DC link into heat with a brake resistor.
If you would like to make the superfluous energy available to other drives, you
should consider a DC link. For further information on the DC link see section 7
Connection.
Make the settings for a brake resistor in the following parameters:
• A21 brake resistor R
• A22 brake resistor P
• A23 brake resistor thermal
Entering a value of 0 in A22 deactivates control of the brake chopper. Note that
the brake chopper continues working when most faults occur. The faults that
cause the brake chopper to be switched off are documented accordingly in
section 16 Diagnosis.
E03 DC-link-voltage version 0
E18 charge relay version 0
Information
Make certain the charge relay contacts are open (E18 = 0:inactive)
before you turn on the power supply. Especially in a compound
system that includes a DC link, make certain that the load relays of
all connected drive controller are open before the power supply is
turned on.
E24 i2t-braking resistor version 0
E33 Vi-max-memorized value version 0
E38 braking energy version 0
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