NORD Drivesystems BU0750 - Manual (Page 86)

NORDAC SK 750E Manual
86 Subject to technical amendments BU 0750 GB-3311
Parameter Setting value / Description / Note
Parameter
set
Available in Option
P111 P - torque limit factor P Always visible
25 ... 400 %
[ 100 ] Directly affects the behaviour of the drive at the 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 P Always visible
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. However, it cannot provide any protection against mechanical
blockages (movement to stops). A slipping clutch which acts as a safety device is essential.
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/P408) then corresponds to the value set in
P112.
The limit value 20% of torque current cannot be undershot by a smaller analog setpoint
(P400/405 = 2) (with P300 = 1, not below 10%)!
401% = AUS stands for switch-off of the torque current limit off! This is also the basic setting for the
FI.
P113 Jog frequency P Always visible
-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 enable.
Alternatively, when control is via the control terminals, the jog frequency can be activated via one of
the digital inputs.
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 the correct sign. The set maximum
frequency (P105) cannot be exceeded and the minimum frequency (P104) cannot be
undershot.
P114 Brake release time P Always visible
0 ... 2.50 s
[ 0.00 ] Electromagnetic brakes have a delayed reaction time for their release, which depends on physical
factors. This can result in the motor running while the brake is still applied, which will cause the
inverter to switch off with an overcurrent message.
This release time can be taken into account in parameter P114 (Brake control).
During the adjustable ventilation time, the FI supplies the set absolute minimum frequency (P505)
thus preventing movement against the brake.
See also the parameter >Brake reaction time< P107 (setting example).
Note:
If the brake release time is set to "0", then P107 is the brake release and reaction time.