Danfoss VLT 5000 Series Manual page 127

NB!
In general it is very important to optimize the
VLT parameters to the motor, i.e. by using
AMA, in order to obtain a good control behavior.
Parameter 205
Parameter 205, maximum reference must be set in
accordance with maximum velocity (option para-
meter #1) before the controller parameters are
optimized.
MG.10.J4.02 – VLT is a registered Danfoss trade mark
®
VLT 5000 SyncPos option
System Control 700
When "enable SyncPos" is selected the VLT is
controlled by the SyncPos option.
When "disable SyncPos" is selected the VLT is not
controlled by the SyncPos PID controller. It is thus
possible to control the VLT by traditional inputs or
serial interface.
Content
Controlled by the option or not
Value range
0 ... 1
0 = enable SyncPos
1 = disable SyncPos
D.TIME CMP.ACT. 780
The active inverter dead time compensation which
is part of the VLT5000 control algorithm (VCC+) is
causing instability at standstill when working in
closed loop control. The purpose of this parameter
is switching off the active dead time compensation
to avoid instability.
Select OFF when the VLT is controlled from the
SyncPos option in speed, position or synchronizing
control. Select ON if the VLT is operated in open
loop speed control. The inverter dead time com-
pensation is providing better control performance
in open loop control.
Content
active inverter dead time compensation
Value range
0; 1
0 = OFF
1 = ON
# 0
# 0
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