Hitachi J300U Series - Manual (Page 61)

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