Program features 63
Automatic restart
It is possible to restart the drive automatically after a short (max. 5 seconds) power
supply failure by using the Automatic restart function provided that the drive is
allowed to run for 5 seconds without the cooling fans operating.
When enabled, the function takes the following actions upon a supply failure to
enable a successful restart:
• The undervoltage fault is suppressed (but a warning is generated)
• Modulation and cooling is stopped to conserve any remaining energy
• DC circuit pre-charging is enabled.
If the DC voltage is restored before the expiration of the period defined by parameter
and the start signal is still on, normal operation will continue.
However, if the DC voltage remains too low at that point, the drive trips on a fault,
WARNING!
Before you activate the function, make sure that no dangerous
situations can occur. The function restarts the drive automatically and
continues operation after a supply break.
Voltage control and trip limits
The control and trip limits of the intermediate DC voltage regulator are relative to the
supply voltage as well as drive/inverter type. The DC voltage is approximately 1.35
times the line-to-line supply voltage, and is displayed by parameter
All levels are relative to the supply voltage range selected in parameter
. The following table shows the values of selected DC voltage levels in volts
and in percent of
U
DCmax
(the DC voltage at the upper bound of the supply voltage
range).
Summary of Contents for ACS860
Page 1: ... ABB INDUSTRIAL DRIVES ACS860 primary control program Firmware manual ...
Page 4: ......
Page 10: ...10 Table of contents ...
Page 18: ...18 Using the control panel ...
Page 24: ...24 Control locations and operating modes ...
Page 54: ...54 Program features ...
Page 78: ...78 Program features ...
Page 90: ...90 Application macros ...
Page 342: ...342 Additional parameter data ...
Page 380: ...380 Fault tracing ...
Page 381: ...Fault tracing 381 ...
Page 382: ...382 Fault tracing ...
Page 436: ...436 Control chain diagrams ...