Explanation of Function
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When braking control function is used, if necessary, assign the following functions to intelligent input / output terminals.
When signal outputted from external braking during releasing braking is inputted to intverter, one of intelligent output terminals (C001 - C008)
should be assigned braking comformation signal : BOK(44)
One of intelligent output terminals (C021 – C025) should be assigned tobraking signal : BRK(19) to release braking.
And when output signal at the time of braking trouble is used, signal of braking touble : BER(20) should be assigned.
When braking control function is used, sensorless vector control (A44 to 03) or 0Hz domain sensorless vector control (A11 to 04) which
generates high torque at starting should be recommended.
Setting item
Code
Function name
Setting range
Initial value
b120
Braking control function selection
00(invalid)/01(valid)
00
b121
The waiting time for braking
releasing confirmation
0.00 - 5.00 s
0.10
b122
Waiting time for acceleration
0.00 - 5.00 s
0.10
b123
Waiting time for stop
0.00 - 5.00 s
0.10
b124
Waiting time for braking
confirmarion
0.00 - 5.00 s
0.10
b125
Releasing frequency
0.00 - 99.99/100.0 - 400.0 Hz
2.00
b126
Releasing current
50% of the rated curret – 200% of the rated current
100%
b121 : Set the time when output current arrives at releasing current after arriving at releasing frequency.
b122 : Set the mecanical late time to release braking from releasing signal outputting.
b123 : Set the mecanical late time to stop braking from releasing signal off.
b124 : Set the more time to input releasing stop signal which braking outputs from releasing signal.
b125 : Set frequency to output braking releasing signal.
b126 : Set output current to permit braking releasing. Be sure that the motor would slip down easily if
setting current is low
In the following case, the inverter occurs trip and outputs braking error signal(BER). (braking error : E36)
In the case that output current is less than releasing curret after waiting time for braking releasing comfirmation.
When braking confirmation signal is used, in the case that braking confirmation signal does not turn on within waiting time for braking
confirmation druing accelerating. In the case that braking confirmation signal does not turn off within waiting time for braking confirmation or
braking confirmation signal turns off although braking releasing signal is outputted, during decelerating
Running command
Output frequency
Braking releasing output
b121
waiting time for conformation
b122 waiting time for acceleration
b123 waiting time for stop
b124 waiting time for braking confirmation
b125 releasing frequency
b125 releasing frequency
Note) Timing chart that braking confirmation signal(BOK) is selected to intelligent input terminal
.
a
b
c
e
f
b124 waiting time for braking confirmation
