Override Functionality; Maximum Automooring Time Protection - ABB ACS880 Firmware Manual

parameter 09.22 Automooring actual
both Internal DTC and external load cell tension feedbacks in parameter
Tension feedback source.
Continuous + Time control mode
This selection is a combination of Continuous and Time control modes. The program
switches from Continuous to Time control after a predefined time. The two modes
work independently. This selection can be used in instances where continuous
adjustment of rope tension is needed for an initial time (for example, 30 minutes, as
shown in the below figure) when the ship arrives at port. After the predefined time
(par. 76.56) elapses, the drive automatically switches to time control Automooring
mode.
Time_1 (1min)
Cont (30min)


Override functionality

For parallel operation to any Automooring mode, the override input is used for forcing
(opens mechanical brake and continuous tension control when the input condition is
True) Automooring On by a dedicated input using parameter
Also, it switches internally to Internal DTC feedback when the load cell is broken and
quick auto tension correction is required.
Settings
Parameters: 76.02 Override control


Maximum Automooring time protection

Maximum Automooring time protection is a protection against an abnormal
Automooring sequence, broken ropes, wrong actual rope tension feedback, or a too
high Automooring setpoint. It enables you to define the maximum running time for the
drive/motor (parameter
the defined time, a protection action can be taken depending on the selection
(parameter 76.61 Max AM timeout
setpoint. Continuous mode can be used with
and 76.10 Tension feedback
76.60 Max AM time). If the drive/motor is running longer than
function).
Winch program features 73
Time_2 (3min)
76.02 Override
source.
76.10
control.