NORD Drivesystems BU0180 - Manual (Page 85)

6 Parameterisation
BU 0180 GB-0914 Pre-series version 85
Parameter
{Factory setting}
Setting value / Description / Note Device Supervisor
Parameter
set
P109
DC brake current
(DC brake current)
S P
0 ... 250 %
{ 100 }
Current setting for the functions of DC current braking (P108 = 3) and combined braking (P108 = 5).
The correct setting value depends on the mechanical load and the required deceleration time.
A higher setting brings large loads to a standstill more quickly.
The 100% setting relates to a current value as stored in the >Nominal current< parameter P203.
NOTE: The amount of DC current (0 Hz) which the FI can supply is limited. For this value,
plese refer to the table in Section 9.4.3, column: 0 Hz. In the basic setting this
limiting value is about 110%.
P110
DC braking time on
(DC braking time on)
S P
0.00 ... 60.00 sec
{ 2.00 }
The time during which the motor has the current selected in parameter >DC brake current<
applied to it during the DC braking functions (P108 = 3).
Depending on the relationship, actual output frequency to max. frequency (P105), the >Time DC
brake on< is shortened.
The time starts running with the removal of the enable and can be interrupted by fresh enabling.
P111
P factor torque limit
(P factor torque limit)
S P
25 ... 400 %
{ 100 }
Directly affects the behaviour of the drive at torque limit. The basic setting of 100% is sufficient for
most drive tasks.
If the value is too large, the drive unit will tend to oscillate when the torque limit is reached.
If the value is too small, the programmed torque limit may be undershot.
P112
Torque current limit
(Torque current limit)
S P
25 ... 400 % / 401
{ 401 }
With this parameter, a limit value for the torque-generating current can be set. This can prevent
mechanical overloading of the drive. It cannot provide any protection against mechanical
blockages (movement to stops). A slipping clutch which acts as a safety device must be provided.
The torque current limit can also be set over an infinite range of settings using an analog input.
The maximum setpoint (compare adjustment 100%, P403[-01] . .[-06]) then corresponds to the
value set in P112.
The limit value 20% of current torque cannot be undershot by a smaller analog setpoint
(P400[-
01] … [-09] = 11 or 12).
401 = OFF means the switch-off of the torque current limit! This is also the basic setting for the FI.