Hitachi L700 Series - Page 101

Chapter 4 Explanation of Functions
4 - 39
(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 terminals [11] to
[15] (C021 to C025) and the alarm relay terminal (C026).
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").
A
004/A204/A304
b020
b018
b016
b01
b017 b019
0
X1.0
5
40
X0.8
0
60
0.5
(
x
)
(y)
(
z
)
0
Inverter output
frequency (Hz)
Range of
setting
(Example) When the output frequency is equal
to the setting of "b017" (When 11 to 75kW)
(x): ("setting of b018"/"rated current") x 109%
(y): ("setting of b018"/"rated current") x 120%
(z): ("setting of b018"/"rated current") x 150%
Maximum frequency (Hz)
Trip time (s)
Output
current (A)