Nord Drivesystems NORDAC FLEX SK 210E Series User Manual

NORDAC FLEX (SK 200E ... SK 235E) – Users Manual for Frequency Inverters
142 BU 0200 en-3118
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P107
Brake reaction time
(Brake reaction time)
P
0 ... 2.50 s
{ 0.00 }
Electromagnetic brakes have a physically-
dependent delayed reaction time when actuated. This
can cause a dropping of the load for lifting applications, as the brake only takes over the load after
a delay.
The reaction time must be taken into consideration by setting parameter P107.
Within the adjustable application time, the FI supplies the set absolute minimum frequency (P505)
and so prevents movement against the brake and load drop when stopping.
If a time > 0 is set in P107 or P114, at the moment the FI is switched on, the level of the excitation
current (field current) is checked. If no magnetising current is present,
the FI remains in
magnetising mode and the motor brake is not released.
In order to achieve a shut-down and an error message (E016) in this case, P539 must be set to 2
or 3.
See also the parameter >Release time< P114
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Information
Brake control
The relevant connection on the frequency inverter must be used to actuate the
electromechanical brake (particularly with lifting mechanisms), if present
(please see
chapter 2.4.2.4 "Electromechanical brake"). The minimum absolute frequency (P505) should
never be less than 2.0 Hz.
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Information
Torque limitation during active setpoint delay
(P107 / P114)
During an active setpoint delay, the torque is limited to a maximum of 160% of the rated
torque. This prevents the occurrence of excessive currents in the inverter or breakdown of the
motor if
• For application of the brake, the brake reaction time (P107) is set too long.
• For release of the brake, the value for the absolute minimum frequency (P505) is set too
high.
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Recommendation for applications:
Lifting equipment with brake, without speed feedback Lifting equipment with brake
P114 = 0.02...0.4 s *
P107 = 0.02...0.4 s *
P201…P208 = Motor data
P434 = 1 (ext. brake)
P505 = 2...4 Hz
for safe start-up
P112 = 401 (off)
P536 = 2.1 (off)
P537 = 150 %
P539 = 2/3 (I
SD
monitoring)
to prevent load drops
P214 = 50...100 % (precontrol)
* Settings (P107/114) depending on
brake type and motor size. At low power
levels (< 1.5
kW) lower values apply for
higher power ratings (> 4.0
kW) are
larger values.
Output
frequency
P107
Brake released
P114
or
P107, when P114 = 0
ON signal
P505
OFF signal
Time
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Nord Drivesystems NORDAC FLEX SK 210E Series Specifications

General

Brand	Nord Drivesystems
Model	NORDAC FLEX SK 210E Series
Category	Inverter
Language	English