Chapter 6 – Firmware Description
ACA 635 IGBT Supply Sections
6-7
Start by the Starting
Switch
By default, the ISU control commands (ON/OFF) are given by the
starting switch on the cabinet door which is wired to digital input DI2.
The starting sequence is as follows:
On/off switch
On/off from relay via
digital input DI2
Charging contactor
Main contactor
Modulating
Synchronization
6 ms
0.5 s
2.5 s
Step
Function
1.
ISU control receives the ON command (DI2 rising edge) from the starting
switch.
2.
ISU control logic closes the charging contactor control circuit (RO1)
3.
ISU control logic closes the main contactor and cooling fan control circuit
(RO3).
4.
ISU control logic receives the “main contactor on” acknowledgement (DI3).
5.
ISU control logic receives the “cooling air fan in operation” acknowledgement
(DI1).
6.
ISU synchronizes itself to the supply network in case DC voltage is OK
(charging is completed successfully).
7.
ISU control starts modulation. The inverter units can be started.
Содержание ACS 600 MultiDrive
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