N700 Operating Instructions and Parts Manual
8. Explanation of b-Group
81
(2) Overload advance notice
①
When the load is high, it is possible to adjust the load by outputting an overload advance
notice.
It is used to prevent damage to the machine under huge load, i.e. baggage on a conveyor,
the Inverter overload protection will operate.
②
Assign overload advance notice level 1(OL=3) / overload advance notice level 2(OL2=21)
to an intelligent output terminal 11-14 or the alarm relay output terminal.
Code
Function name
Initial
value
Unit
Setting
range
Contents
o026
Overload advance
notice level 1
1.0 times
0.0~2.0
0 ~ Rated current
ⅹ
2time
As load reaches overload advance notice level.
OL signal is output.
o027
Overload advance
notice level 2
1.0 times
0.0~2.0
0 ~ Rated current
ⅹ
2time
As load reaches overload advance notice level.
OL2 signal is output.
Table 8- 20 Overload advance notice (o026, o027)
Fig. 8- 11 The waveform for overload advance notice level
8.15
External thermistor (b034~b036)
(1) Temperature protection of the external machine is possible by the use of a thermistor fitted to
your motor.
(2) Wire the thermistor between control terminals TH and CM1.
(3) Set the following function according to the thermistor specification.
Code
Function name
Initial value
Unit
Setting range
Contents
0
Invalid : No temperature protection by
external thermistor
1
PTC : Valid normal temperature/factor
resistance element (For PTC)
b034
Thermistor
selection
0 -
2
NTC : Valid (For NTC)
b035
Thermistor error
level
3000
Ω
0~9999
Set the resistance value of temperature
for trip according to thermistor methods.
b036 Thermistor
control
105.0
-
0.0~999.9
Use this as gain adjustment
Table 8- 21 External thermistor (b034~b036)
