N700 Operating Instructions and Parts Manual
8. Explanation of b-Group
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8. E
XPLANATION OF
b-
GROUP
8.1
Operation limit (b001)
(1) Rotational direction restriction (b001)
①
The direction of the motor can be restricted in this function.
②
This is effective when the operating command is set by the digital operator or the terminal.
Code
Function name
Initial
value
Unit
Setting
range
Contents
0
Forward driving and reverse driving are valid
1
Forward driving is valid
b001
Rotational direction
restriction
0 -
2
Reverse driving is valid
Table 8- 1 Rotational direction restriction
8.2
Starting method setting function (b003~b004)
(1) Reduced voltage start selection (b003)
①
This function is to raise the voltage slowly on motor starting.
②
In case of raising the motor torque on starting, make the setting value low.
However, the inverter has a tendency of tripping on over-current protection by making this
value lower, because of almost direct starting.
F004
Output
frequency
Output
voltage
FW
↑
0
↑
1
↑
6
…
Fig. 8- 1 Reduced voltage start selection curve
Code
Function name
Initial value
Unit
Setting range
Contents
b003
Reduced voltage start selection
0
-
0~6
Short(about 50ms) ~
Long(about 160ms)
Table 8- 2 Reduced voltage start selection (b003)
(2) Retry limitation (b004)
When a retry is selected through b016, where b004 is 0, an instantaneous stop or under-
voltage trip makes the inverter try to restart 16 times and then a trip will occur at 17th time. In
case an over-current or over-voltage trip occurs, the inverter try to restart 3 times and then a
trip will occur at 4th time.
