ABB ACQ810, Firmware Manual

Page: 140 / 376

140 Parameters
11
11 Start/stop mode Start and stop modes; magnetization settings; DC hold
configuration.
11.01 Start mode Selects the motor start function.
Notes :
• Selections Fast and Const time are ignored if parameter
99.05 is set to Scalar .
• Starting to a rotating machine is not possible when DC
magnetizing is selected ( Fast or Const time ).
Fast The drive pre-magnetizes the motor before start. The pre-
magnetizing time is determined automatically, being typically
200 ms to 2 s depending on motor size. This mode should
be selected if a high break-away torque is required.
Note: This parameter cannot be changed while the drive is
running.
0
Const time The drive pre-magnetizes the motor before start. The pre-
magnetizing time is defined by parameter
11.02 Dc-magn
time . This mode should be selected if constant pre-
magnetizing time is required (e.g. if the motor start must be
synchronized with the release of a mechanical brake). This
setting also guarantees the highest possible break-away
torque when the pre-magnetizing time is set long enough.
WARNING! The drive will start after the set
magnetizing time has passed even if motor
magnetization is not completed. In applications
where a full break-away torque is essential, ensure that the
constant magnetizing time is long enough to allow
generation of full magnetization and torque.
1
Automatic Automatic start guarantees optimal motor start in most
cases. It includes the flying start function (starting to a
rotating machine) and the automatic restart function (a
stopped motor can be restarted immediately without waiting
the motor flux to die away). The drive motor control program
identifies the flux as well as the mechanical state of the
motor and starts the motor instantly under all conditions.
Note: If parameter 99.05 Motor ctrl mode is set to Scalar , no
flying start or automatic restart is possible by default.
2
11.02 Dc-magn time Defines the constant DC magnetizing time. See parameter
11.01 Start mode . After the start command, the drive
automatically premagnetizes the motor the set time.
To ensure full magnetizing, set this value to the same value
as or higher than the rotor time constant. If not known, use
the rule-of-thumb value given in the table below:
Note: This parameter cannot be changed while the drive is
running.
0 … 10000 ms Constant DC magnetizing time. 1 = 1 ms
No. Name/Value Description FbEq
Motor rated power Constant magnetizing time
< 1 kW > 50 to 100 ms
1 to 10 kW > 100 to 200 ms
10 to 200 kW > 200 to 1000 ms
200 to 1000 kW > 1000 to 2000 ms