5.2 Basic parameters
BU 0500 GB Subject to technical alterations 75
Parameter Set value / Description / Note Device Supervisor
Parameter
set
P110 Time DC brake on
S P
0.00 ... 60.00 s
[ 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. quency (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
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 values are too high the drive tends to vibrate as it reaches the torque limit.
If values are too low, the programmed torque limit can be exceeded .
P112 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
obstruction (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/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) (in servo mode with P300 = 1, not below 10%)!
401 = OFF means the switch-off of the torque current limit! This is also the basic setting for the FI.
P113 Jog frequency
S P
-400.0 ... 400.0 Hz
[ 0.0 ]
When using the ControlBox or ParameterBox to control the FI, the jog frequency is the initial
value following successful enabling.
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 ventilation time
S P
0 ... 2.50 s
[ 0.00 ]
Electromagnetic brakes have a delayed reaction time during release, which depends on physical
factors. This can lead to the motor running while the brake is still applied, which will cause the
inverter to switch off with an overcurrent report.
This release time can be taken into account in parameter P114 (Braking control ).
During the adjustable release 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 ventilation time is set to "0", then P107 is the brake release and
application time.
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