84
"A" Group: Standard Functions Section 3-5
DC braking performance at start can also be set separately (a057 and a058).
And carrier frequency of DC braking performance can also be set separately
(
a059)..
Additionally is possible to trigger the
DC injection by a digital input when
the terminal [DB] is turned ON. Set
the following parameters to do it
•
A053 – DC braking delay time set-
ting. The range is 0.1 to 5.0 sec-
onds.
•
A054 – DC braking force setting.
The range is 0 to 100%.
The scenarios to the right help show
how DC braking works in various situ-
ations.
1. Scenario 1 – The [FW] or [RV] ter-
minal is ON. When [DB] is ON,
DC braking is applied. When [DB]
is OFF again, the output frequen-
cy ramps to the prior level.
2. Scenario 2 – The Run command
is applied from the operator key-
pad. When the [DB] terminal is
ON, DC braking is applied. When
the [DB] terminal is OFF again,
the inverter output remains OFF.
"A" Function Run
Mode
Edit
Defaults
Func.
Code
Name Description EU Units
A051 DC braking enable Three options; select codes:
00... Disable
01... Enable during stop
02... Frequency detection
8 00 –
A052 DC braking frequency The frequency at which DC brak-
ing begins, range is from the start
frequency (B082) to 60Hz
8 0.5 Hz
A053 DC braking wait time The delay from the end of con-
trolled deceleration to start of DC
braking (motor free runs until DC
braking begins), range is 0.0 to
5.0 sec.
8 0.0 sec.
A054 DC braking force for decelera-
tion
Level of DC braking force, settable
from 0 to 100%
8 50. %
A055 DC braking time for decelera-
tion
Sets the duration for DC braking,
range is from 0.0 to 60.0 seconds
8 0.5 sec.
A056 DC braking / edge or level
detection for [DB] input
Two options; select codes:
00... Edge detection
01... Level detection
8 01 –
a057 DC braking force at start Level of DC braking force at start,
settable from 0 to 100%
8 0. %
a058 DC braking time at start Sets the duration for DC braking,
range is from 0.0 to 60.0 seconds
8 0.0 sec.
a059 Carrier frequency during DC
braking
Carrier frequency of DC braking
performance, range is from 2.0 to
15.0 kHz
8 5.0 sec.
[FW,RV]
1
0
[DB]
1
0
Output
frequency
Scenario 1
t
Run command
from operator
1
0
[DB]
1
0
Output
frequency
Scenario 2
t
Run command
from operator
1
0
[DB]
1
0
Output
frequency
Scenario 3
t
delay
A053
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