KEB Combivert F5 Instruction Manual page 18

Description of the Unit
Flow chart for UPS operation
Control release (X2A.16)
UPS operation (X2A.17)
Leveling speed (X2A.11)
Brake (X2A.27/28/29)
HS (X2A.24/25/26)
t1 The travel direction and the set speeds VU and VL must be set.
t2 After a debounce timer run out the main contactors are controlled (powerless switching) . Via the main
contactors the control release X2A.16 is set and the inverter checks in all phases whether the current can
flow to the motor.
t3 When the motor phase check succeeds the output for the the brakes will be set and the brake release time
runs out.
t4 After the brake release time has run out the inverter starts turning the motor.The internal undervoltage level
is reduced to 200 VDC.
t5 When the car reaches the deceleration switch the setspeed inputs must be reset.
t6 When the motor has decelerated to zero speed the brake out will be reset. Afterwards the brake closing
time runs out.
t7 The main contactor output is reset after elapsed brake closing time. The control release is also switched
off with the main contactors and the direction of rotation can be reset.
For undersized UPS the inverter can recognise the „easy direction". That means the travel direction will be in that
direction where the load is pulling (see also Ld.24). Therefore both direction inputs must be set together with the
set speed inputs.
GB - 18
V (LF.27)
U
forward (X2A.14)
v
t1 t3
t2 t4
t
t6 t7
t5