Hitachi L100 User Manual
L100 Inverter
Oper
ations
and Monitor
ing
4–25
Overload Advance Notice Signal
When the output current exceeds a preset
value, the [OL] terminal signal turns ON.
The parameter C_41 sets the overload
threshold. The overload detection circuit
operates during powered motor opera-
tion and during regenerative braking. The
output circuits use open-collector
transistors, and are active low.
value, the [OL] terminal signal turns ON.
The parameter C_41 sets the overload
threshold. The overload detection circuit
operates during powered motor opera-
tion and during regenerative braking. The
output circuits use open-collector
transistors, and are active low.
NOTE: The example circuit in the table above drives a relay coil. Note the use of a
diode to prevent the negative-going turn-off spike generated by the coil from damaging
the inverter’s output transistor.
diode to prevent the negative-going turn-off spike generated by the coil from damaging
the inverter’s output transistor.
[OL]
Signal
C 41
C 41
1
0
0
ON
t
ON
Current
threshold
regeneration
power running
threshold
Option
Code
Terminal
Symbol
Function Name
Output
State
Description
03
OL
Overload Advance
Notice Signal
Notice Signal
ON
when output current is more than the set thresh-
old for the overload signal
old for the overload signal
OFF
when output current is less than the set threshold
for the overload signal
for the overload signal
Valid for outputs:
11, 12
Required settings:
C_41
Notes:
•
•
The default value is 100%. To change the level
from the default, set C_41 (overload level).
from the default, set C_41 (overload level).
•
The accuracy of this function is the same as the
function of the output current monitor on the [FM]
terminal (see page
function of the output current monitor on the [FM]
terminal (see page
Example (requires output configuration—
see page
see page
):
RY
+
–
–
See I/O specs on page
12 11
L
H O OI
FM CM2
Inverter output
terminal circuit
terminal circuit
OL