150
Event Sequence
1) Drive is enabled, outputs assigned to Mcc activate.
2) Direction signal is given. Note if Mcc output function is used, direction signals
must be quali ed by the closing of the main contactor.
3) The drive performs a current check to be sure the motor is connected and
that rated magnetizing current is produced. This current check requires about
300mSec to complete.
4) If pretorque is not used the analog input is clamped for the period adjusted in
LF.70. If pre-torque is used, the drive is applying pre-torque to the motor during
this time. In either case motion can not occur so the controller must delay the
pattern by at least the amount adjusted in LF.70 or the sum of the timer values
in US.17 and US.18. After this time the controller can begin to ramp the analog
command. This time should be adjustable to accommodate different brake release
times.
5) Once the actual speed is above two times the leveling speed adjusted in LF.41,
the HSD output function turns on.
6) If there is speed deviation during the run that exceeds the adjustment of LF.58
and LF.59, the ASD output turns off.
7) Once the speed deviation corrects itself, the ASD output turns on again.
8) When the elevator decelerates below, 1.5 times the leveling speed adjusted in
LF.41, the HSD output turns off.
9) When the analog speed pattern is reaches zero, the controller should drop the
direction signal. Exception, in the event of re-leveling leave the direction signal
active and simply provide the re-leveling command with the analog pattern signal.
When the direction turns off the timer in LF.78 begins. Additionally, the Brk
output function turns off when the direction signal is turned off. If the controller
is controlling the brake, the brake should be set at this time.
10) The drive maintains full control and current to the motor for the time period
adjusted in LF.78. After which, the drive will reduce speed control gains and
begin to ramp the motor current down to zero over the time adjusted in LF.79.
11) After the sum of the times in LF.78 and LF.79 the motor current is zero and it is
safe to disable the drive and open the main contactor. Since LF.78 and LF.79
are adjustable to account for variable brake drop times, the corresponding time
delay should also be adjustable in the controller.
12) Drive is disabled and the Mcc output turns off.
Input/Output Con guration
To Next Page
Loading...
Need help?
General
