NORD Drivesystems BU0300 - Manual (Page 81)

7.6 Basic parameters
BU 0300 EN Subject to technical alterations 81
Parameter Setting value / Description / Note
Supervisor
Parameter
set
Available with option
P109 DC current brake
S P
Always available
0 ... 250 %
[ 100 ] Current setting for direct current braking (P108= 3) and combined braking (P108= 5) functions.
The correct setting value depends on the mechanical load and the required braking 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.
P110 DC braking time on
S P
Always available
0 ... 60.00 s
[ 2.0 ] The time that the motor is applied, during the direct current braking (P108= 3) function, with the
current selected in the >DC braking current< parameter (P109).
Depending on the ratio of actual output frequency to max. frequency (P105), the >DC braking time<
is reduced.
The time starts with the removal of the enable and can be interrupted by fresh enabling.
P112 Torque current limit
S P
Always available
25 ... 400 % / 401
[ 401 ] With this parameter, a limit value can be set for the torque generating current. 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%, P402, P408) then corresponds to the value set
in P112.
The limit value 20% of current torque cannot be undershot by a smaller analog setpoint
(P400/405=2).
401 = OFF is for switching the torque current limit off! This is also the basic setting for the FI.
P113 Jog frequency
S P
Always available
-400.0...400.0 Hz
[ 0.0 ] When using the ControlBox or ParameterBox to control the FI, the jog frequency is the starting
value following successful enable if it is greater than the minimum frequency.
When controlling via control terminals, the jog frequency can be switched on via one of the digital
inputs (P420-424= jog frequency >15<). None of the digital inputs may be programmed for enable
(function 1 or 2).
The setting of the jog frequency can be done directly via this parameter or, if the FI is enabled via
the keyboard, by pressing the ENTER key. In this case, the actual output frequency is set in
parameter P113 and is then available for the next start.
NOTE: Specified setpoints via the control terminals, e.g. jog frequency, fixed frequencies or analog
setpoints, are generally added with correct sign. The set maximum frequency (P105) cannot
be exceeded in this case, and the minimum frequency (P104) cannot be undershot.