KEB COMBIVERT F5 Instruction Manual page 147

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 qualified 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) The high speed signal is given. Note this signal can be given together with the
direction signals or afterward.
5) If pretorque is not used the speed is held at zero the period adjusted in LF.70. If
pre-torque is used, the drive is applying pre-torque to the motor during the total
time in US.17 and US.18. These times are adjustable to accommodate different
brake release times. The drive begins to accelerate the motor based on the adjusted
pattern.
6) Once the actual speed is above two times the leveling speed adjusted in LF.41,
the HSD output function turns on.
7) If there is speed deviation during the run that exceeds the adjustment of LF.58 and
LF.5, the ASD output turns off.
8) Once the speed deviation corrects itself, the ASD output turns on again.
) The high speed signal is removed and the drive begins to decelerate the elevator
to the floor. Note variations in the turn off of the high speed signal will result in
inconsistent approach to the floor. Therefore this signal must have minimal delay
in processing from the controller.
10) When the elevator decelerates below, 1.5 times the leveling speed adjusted in
LF.41, the HSD output turns off.
11) When the elevator reaches the floor, 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 by selecting leveling speed. 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.
12) 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.7.
13) After the sum of the times in LF.78 and LF.7 the motor current is zero and it is
safe to disable the drive and open the main contactor. Since LF.78 and LF.7 are
adjustable to account for variable brake drop times, the corresponding time delay
should also be adjustable in the controller.
14) Drive is disabled and the Mcc output turns off.
Input/Output Configuration
147