A 38, Dynamic Braking Usage Ratio; A 39, A 40 Arrival Optional Frequency At Acceleration And At Deceleration - Hitachi J300 Series Instruction Manual

Extension
function
code
Set the usage ratio (%) for 100 seconds of BRD.
When the BRD operation exceeds this setting,
the operation will be stopped.
Dynamic
braking
usage ratio
BRD ON
When
at an optional frequency. When frequency arrival signal output method 1 is selected, an output
signal is outputted at an optional frequency or more. For acceleration
Arrival
optional
frequency
at accelera-
tion
Arrival
optional
frequency
at decelera-
tion
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Setting method
2
FUNC
Initial value
2
Function contents
t1
ON ON
100 seconds
(t1 + t2 + t3)
T =
100 seconds
NOTE 7: This function cannot be used for the inverter types 110 to 550L/HF which have no built-in BRD
(dynamic braking) circuit.
frequency arrival signal output method 2 is selected, an output signal is outputted
, the frequency is set in units of 0.1 Hz (in units of 1 Hz for 100 Hz or more).
Setting method
In the case of optional
arrival frequency
FUNC
of acceleration
FUNC
In the case of optional
arrival frequency
FUNC
of deceleration
FUNC
Contents and display
1
FUNC
.
1
.
t2 t3
ON
100
Model
External
resistor
Usage ratio
2
1
Initial value
Output
.
frequency
setting
2
1
setting
Initial value
0
Output
.
signal
(FA1)
7-21
NOTE 1: The internal BRD circuit is not mounted
in an inverter other than the types 055L/HF,
and 075L/HF.
NOTE 2: When 0 % is set, the BRD will not be
operated.
NOTE 3: When T exceeds the set value, the BRD
will be stopped.
NOTE 4: When mounting an external BRD unit, set
the usage ratio to
external resistors.
NOTE 5: The initial settings of 110-550L/HF
are 0.0%.
NOTE 6: Conditions when using the external
resistor are shown in the table.
Inverter requiring an external resistor
055, 075LF
RB1 to RB3
(17 ohm or more)
Max. 10 (%)
At the time of acceleration, an output signal
is turned ON in a range from the set frequency
-0.5 Hz to the set frequency +1.5 Hz. At the
time of deceleration, an output signal is turned
ON in a range from the set frequency +0.5 Hz
to the set frequency -1.5 Hz.
f
   
1.5 Hz
-0.5 Hz
ON
60 ms
and remove the
.
055, 075HF
RB2, two each in series
(70 ohm or more)
Max. 10 (%)
and deceleration
0.5 Hz
-1.5 Hz
t
Running
time
60 ms