196 Parameters
21
21 Start/stop mode
Start and stop modes; emergency stop mode and signal
source selection; DC magnetization settings.
21.01 Vector start mode Selects the motor start function for the vector motor control
mode, ie. when 99.04 Motor control mode is set to Vector.
Notes:
• The start function for the scalar motor control mode is
selected by parameter 21.19 Scalar start mode.
• Starting into a rotating motor is not possible when DC
magnetizing is selected (Fast or Const time).
• With permanent magnet motors, Automatic start mode
must be used.
• This parameter cannot be changed while the drive is
running.
See also section DC magnetization (page 115).
Automatic
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.
0
Const time The drive pre-magnetizes the motor before start. The pre-
magnetizing time is defined by parameter 21.02
Magnetization 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 into a rotating
motor) and the automatic restart function. 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 99.04 Motor control mode is set to Scalar,
no flying start or automatic restart is possible unless
parameter 21.19 Scalar start mode is set to Automatic.
2
No. Name/Value Description Def/FbEq16
ACS580 FW.book Page 196 Wednesday, September 21, 2016 9:48 PM
To Next Page
Loading...
