User Manual

Chapter 7 Explanation of Functions
7 - 62
(b) Constant-torque characteristic
Make this setting when driving a constant-torque motor with the inverter.
(c) Free setting of electronic thermal characteristic
To protect the motor against overheating, you can set the electronic thermal characteristic freely according
to the load on the motor.
The range of setting is shown in the figures below.
Item Function code Range of data Description
Free setting, electronic
thermal frequency (1) (2)
(3)
b015/b017/
b019
0. to 400. (Hz) Setting of frequency at each breakpoint
Free setting, electronic
thermal current (1) (2) (3)
b016/b018/
b020
"0.2 x rated
current" to "1.0 x
rated current"
Setting of the current at each breakpoint
(3) Thermal warning
You can configure this function so that the inverter outputs a warning signal before the electronic thermal
protection operates against motor overheat. You can also set the threshold level to output a warning signal
with the electronic thermal warning level setting (C061).
To output the warning signal, assign function "13" (THM) to one of the intelligent output terminal [11]
(C021) and the alarm relay terminal (C026).
And electronic thermal overload monitor is displayed on “d104”.
Item Function code Data Description
Electronic thermal
warning level setting
C061
0. Disabling the warning output
1. to 100. (%) (*1)
Setting of the threshold level to output the
thermal warning signal
*1 Set the ratio (%) of the warning level to the integrated value of the electronic thermal characteristic. A
setting of 100% corresponds to the inverter trip due to overload (error code "E05").
Inverter output
frequency (Hz)
Range of
setting
X1.0
3
40
X0.8
0
X1.0
0
60
X0.9
X0.8
3 1.5
Reduction
scale
Inverter output
frequency (Hz)
7.7
(109%)
10.7
(150%
)
14.2[A]
(200%)
0
Motor current (A)
(Ratio to the rated current of inverter)
60
3.0
Trip time (s)
(Example) 015L**, Base frequency60Hz,（rated current7.1A = b012）
60Hz （Reduction scale：x1.0）
7.0
(98.1%)
9.6
(135%
)
12.8[A]
(180%)
0
60
3.0
1.5Hz （Reduction scale：x0.9）
Motor current (A)
(Ratio to the rated current of inverter)
Trip time (s)
Output current (A)
A
004/A204
Maximum
frequency (Hz)
b020
b018
b016
b015
b017 b019
0