Overload Advance Notice Signal - Hitachi L300P Series Instruction Manual

Overload
When the output current exceeds a
preset value, the [OL] or [OL2]
Advance Notice
terminal signal turns ON. The parame-
Signal
ter C041 (or C111, respectively) sets
the overload threshold. The overload
detection circuit operates during
powered motor operation and during
regenerative braking. The output relay
contacts are closed when the inverter is
in overload (normally open logic).
Valid for
outputs:
Required
settings:
Notes:
• The default value is 100%. To change the
• The accuracy of this function is the same as
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.
Symbol Function Name
Code
03 OL Overload advance
notice signal (1)
11, 12, AL0 – AL2
C041
level from the default, set C041 (overload
level).
the function of the output current monitor on
the [FM] terminal (see "Analog Output
Operation" on page 4–54).
Current
C041
Set
value
C041
[OL]
Signal
Output
Description
State
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)
Example: (Requires output configuration—
see page 3–48.)
Inverter output terminal circuit
12C 12A
24VDC
See I/O specs on page 4–8.
4–39
L300P Inverter
threshold
power running
regeneration
threshold
t
OL
11C 11A
+
L
–