Group 12 Digital Io - ABB ACSM1 Firmware Manual

94
Group 11 START/STOP MODE
These parameters select the start and stop functions as well as the autophasing
mode, define the DC magnetising time of the motor, and configure the DC hold
function.
11
Firmware block:
START/STOP MODE
(11)
11.01 START MODE
Selects the motor start function.
Notes:
• This parameter has no effect if parameter
• Starting to a rotating machine is not possible when DC magnetising is selected
time).
• With permanent magnet motors, automatic start must be used.
• This parameter cannot be changed while the drive is running.
(0) Fast
(1) Const time
(2) Automatic
Parameters and firmware blocks
START/STOP MODE
FW block: START/STOP MODE
99.05 MOTOR CTRL MODE
DC magnetising should be selected if a high break-away torque is
required. The drive pre-magnetises the motor before the start. The
pre-magnetising time is determined automatically, being typically 200
ms to 2 s depending on the motor size.
Constant DC magnetising should be selected instead of FAST DC
magnetising if a constant pre-magnetising time is required (eg, if the
motor start must be simultaneous with a mechanical brake release).
This selection also guarantees the highest possible break-away
torque when the pre-magnetising time is set long enough. The pre-
magnetising time is defined by parameter
WARNING! The drive will start after the set magnetising time
has passed even if motor magnetisation is not completed. In
applications where a full break-away torque is essential,
ensure that the constant magnetising time is long enough to allow
generation of full magnetisation and torque.
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 (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.
(see above)
is set to (1) Scalar.
((0) Fast
11.02 DC MAGN
or (1) Const
TIME.