Chapter 8 Application
8-25
Cx2000 AC Drive
8.17 Over voltage trip prevention during deceleration and Power Braking
Group
Code Item
Set Value
Setting range Initial
Unit
Function
Group 1
F 4
Select stop method
3
0 ~ 3
0
F59
BIT 0: stall prevention under
Accel
BIT 1: stall prevention under
constant speed
BIT 2: stall prevention
under Decel
-
0 ~ 7
0
F61
Select voltage limit under
Decel
-
0 ~ 1
0
To prevent overvoltage trip when reducing speed, set BIT2 of F59 to 1 and set 3 of F4 for Power
Braking.
Overvoltage trip prevention when reducing speed: a function preventing overvoltage trip when
reducing speed or at stop by using the regeneration braking power.
Power Braking: Adjusting the deceleration slope or accelerate again, when inverter‟s DC voltage rises
above a certain level by the electric motor‟s regeneration energy. It can be used when short
deceleration time without braking resistance is needed. However, be aware that the deceleration time
can get longer than the set one and when it‟s used at a load that frequently decelerates, be cautious of
damage caused by the motor‟s over heating.
Caution
Stall prevention and Power Braking only operate when decelerating, and Power
Braking has the precedence. That is, when BIT2 of F59 and Power Braking of F4 are both
set, Power Braking operates.
F61(selecting voltage restriction when decelerating) is visible when BIT2 of F59 is set.
Overvoltage trip may occur, if the deceleration time is too short or the inertia too big.
Содержание C*2000 Series
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