Arfiff05 Standard AFE-II
vacon •
11
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
3.
OPERATION
3.1
Charging of DC
This AFE application has own charging control, P2.4.1.9 DC Charge (24 Vdc required for control
board)
level
within set time P2.7.1.5 Charge Max Time (provided that DC Voltage reach at least drive under
voltage fault level).
Charging function is activated when P2.4.1.9 DC Charge is A.1 or higher. When control place is IO,
Keypad or NCDrive charging is started from start command.
Charging is not started if:
-
Drive is in fault state.
-
P2.3.1.2 Enable MCB Close is FALSE
-
P2.3.1.6 Run Enable is FALSE
-
P2.3.1.7 Quick Stop is FALSE
Charging is also stopped if above conditions happens during charging or start command is removed.
For fieldbus control charging is started with B0 of FB Control Word on supporting FB profiles.
Charging is also stopped if B0 goes low as is MCB opened if already closed.
DC Charge (F80) is given if 85 % of DC Nominal is not reached within P2.7.1.5 Charge Max Time and
charging is stopped.
DC Charging is stopped when drive receives feedback from P2.3.1.5 MCB Status.
Note! Use suitably sized DC Charging resistor by checking Pulse loadability for time duration set in
for Max Charge Time parameter
3.2
Main Circuit breaker control (MCB control)
The AFE application controls the MCB of the system with Relay Output RO2. When charging of the DC
bus is ready the MCB will be closed. The status of the MCB is monitored via digital input P2.3.1.5
MCB Status (Default is DigIn: A.4). MCB feedback is required for correct AFE functionality,
NOTE! MCB feedback is required for correct AFE functionality.
Over Current (F1), Hardware IGBT (F31) and Software IGBT (F41) faults will open MCB immediately.
Some fault can be programmed to open MCB if needed.
NOTE! For correct operation of AFE system, AFE unit needs to be in control of charging circuit and
Main Circuit Breaker (MCB).
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