A 26, A 27 External Frequency Setting Start And End; A 34, Instantaneous Restart Selection (Restart Selection) - Hitachi J300 Series Instruction Manual

Extension
function
code
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.
External frequency
setting start
Setting method
External
frequency
setting
start
External frequency
setting end
External
Frequency
setting end
Set the inverter retry method when a power error occurs.
Select the set value of the retry method to be used.
Instanta-
neous
restart
selection
Restart
selection
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Initial value
2
FUNC
FUNC
Same as A26
Setting method
2
FUNC
Initial value
NOTE 1: 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.
NOTE 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.


Contents and display

 
60
.
50


1
30
(400)
0 10 V
 
0 5 V
4 20 mA
Output
60
frequency
(Hz)
0 2 8 V
0 1 4 V
4 7.2 16.8
Start setting
command (20%)
Initial value
1
FUNC
7-20
NOTE 1: The standard setting is 0 Hz.
In this case, the selected V/f
pattern is used for running.
NOTE 2: When changing the V/f pattern
after A 26 (start) and A 27 (end)
are set, readjust A 26 (start) and
A 27 (end).
NOTE 3: 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
Frequency
command
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.
NOTE 4: The setting shown left is also
possible with F31 of the remote
operator.
Frequency
10 V
command
5V
20mA
End setting
command (80%)
Set value Function
0 Alarm output after tripped
1 Deceleration stop at the time
of restart
Frequency matching start at the time
2
of restart ( Note 1)
3
0 Hz start at the time of restart