Yaskawa CIMR-V7AM-091 - Manual (Page 3)

Date: 02/20/05, Rev: 05-02 Page 3 of 15 TM.V7SW.091
2. Details of KEB Specification
2.1 Basic Circuit
The KEB function becomes active when parameter n081 (Operation after Recovery from
Momentary Power Loss) is set to 3 (KEB Continuous Operation) or when a multi-function digital
input terminal is set to the KEB command. To restore the motor to the former operation status upon
recovery from a power loss, program one of the multi-function digital input terminals S1 to S7 (n050
to 056) to the KEB command (set values: 28 or 29) as shown in the following table. The run
command must also be maintained during the momentary power loss. When the run command is
removed during the momentary power loss, the drive continues decelerating to a stop even if power
returns.
SA
IM
R
B1 B2
R(L1)
S(L2)
T(L3)
U(T1)
V(T2)
W(T3)
Power Supply
Transformer
S1 Forward Run
S7 KEB Command
n056=××
SC
Regenerative
Energy
・ When regenerative energy is too
large and causes an overvoltage
(OV) trip, connect a braking
resistor.