NORD Drivesystems BU0200 - Manual (Page 179)

SK 200E Manual for frequency inverters
178 Subject to technical alterations BU 0200 GB-4411
Parameter
{Factory setting}
Setting value / Description / Note Device Supervisor
Parameter
set
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.
This reaction time can be taken into account under parameter P107 (Braking control).
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.
See also the parameter >Release time< (P114)
NOTE: The relevant connection on the frequency inverter should be used to control
electromagnetic brakes (especially for lifting devices) (Section 2.7.4) (applies to
SK 2x5E). The minimum absolute frequency (P505) should never be less than
2.0Hz.
NOTE: 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.
NOTE: If brake control is used, care must be taken that parameter (P107) is not set to 0
(see also Section 2.7.4).
Recommendation for applications:
Lifting equipment with brake, without speed feedback
P114 = 0.2...0.3sec.
P107 = 0.2...0.3sec.
P201…P208 = Motor data
P434 = 1 (ext. brake)
P505 = 2...4Hz
for safe start-up
P112 = 401 (off)
P536 = 2.1 (off)
P537 = 150%
P539 = 2/3 (I
SD
monitoring)
against load drops
P214 = 50...100% (precontrol)
Output
frequency
P107
Brake released
P114
or
P107, when P114 = 0
ON signal
P505
OFF signal
Time