Hitachi J300U Series - Manual (Page 60)

7-20
Contents and display
Extension
function
code
➤
➤
1 2
➤
FUNC FUNC
➤
Instanta-
neous
restart
selection
Set value Function
0 Alarm output after tripped
1 Deceleration stop at the time
of restart
2
Frequency matching start at the time
of restart ( Note 1)
Initial value
Setting method
Set the inverter retry method when a power error occurs.
Select the set value of the retry method to be used.
3 0 Hz start at the time of restart
NOTE 1:
NOTE 2:
When the base frequency is one of the following ones, frequency matching may restart at 0 Hz.
When the base frequency is 60 Hz: Driven at 40 Hz or less
When the base frequency is 50 Hz: Driven at 30 Hz or less
For other precautions, refer to Chapter 1, "Instantaneous stop restart" of Appendix 2.
Since the retry mode is selected, the equipment restarts for trips of overcurrent, overvoltage, or undervoltage.
For undervoltage, 16 retries (17th trip) are executed.
For overcurrent or overvoltage, 3 retries (fourth trip) are executed.
Do not use this function for a case that a fallen substance should be held by the machine brake when the motor
is in the free-run mode.
Initial value
Restart
selection
➤
➤
,,
,,
External
frequency
setting
start
External
Frequency
setting end
Set the frequency for starting output for an external frequency command (0 to 10 V, 0 to 5 V,
4 to 20 mA) and the frequency for ending output. When 0 Hz is set, this function will be canceled.
➤
➤
1 2
➤
FUNC
Initial value
Setting method
➤
FUNC
.
(400)
,
External frequency
setting start
External frequency
setting end
Same as A26
Output frequency (Hz)
Frequency
command 0 10 V
0 5 V
4 20 mA
NOTE 1:
NOTE 2:
NOTE 3:
NOTE 4:
The standard setting is 0 Hz.
In this case, the selected V/f
pattern is used for running.
When changing the V/f pattern
after A 26 (start) and A 27 (end)
are set, readjust A 26 (start) and
A 27 (end).
When A 26 (start) > A 27 (end)
is set and the frequency command
value is minimized (0 V or 4 mA),
the output frequency may be
lowered than the value which is
set by A 26 by 0.1 to 0.3 Hz.
The reason is that it is judged that
there is some frequency due to
noise on the signal line and it is a
normal operation.
The setting shown left is also
possible with F31 of the remote
operator.
60
30
50
,
Output
frequency
(Hz)
60
10 V
5V
20mA 0 8 V
0 4 V
4 16.8
2
1
7.2
Start setting
command (20%)
Frequency
command
End setting
command (80%)