Overload advance notice signal – Hitachi L300P User Manual
Page 169
L300P Inverter
Oper
ati
ons
and Monitor
ing
4–39
Overload
Advance Notice
Signal
When the output current exceeds a
preset value, the [OL] or [OL2]
terminal signal turns ON. The parame-
ter C041 (or C111, respectively) sets
the overload threshold. The overload
detection circuit operates during
powered motor operation 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.
Opt.
Code
Symbol
Function Name
Output
State
Description
03
OL
Overload advance
notice signal (1)
ON
when output current is more than the set
threshold for the overload signal (C041)
OFF
when output current is less than the set
threshold for the overload signal (C041)
Valid for
outputs:
11, 12, AL0 – AL2
Required
settings:
C041
Notes:
• The default value is 100%. To change the
level from the default, set C041 (overload
level).
• The accuracy of this function is the same as
the function of the output current monitor on
the [FM] terminal (see
).
power running
Set
value
[OL]
Signal
regeneration
Current
threshold
threshold
C041
C041
ON
ON
t
OL
See I/O specs on page
.
Inverter output terminal circuit
12C
12A
11C
11A
24VDC
L
Example (requires output configuration—
see page
):
+
–