Hitachi SJ300 Series, Инструкция по эксплуатации

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Using Intelligent Output Terminals
Oper
ations
a
nd Moni
tor
ing
4–46
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)
26 OL2 Overload advance
notice signal (2) ON when output current is more than the set
threshold for the overload signal (C111)
OFF when output current is less than the set
threshold for the overload signal (C111)
Valid for
outputs:
11, 12, 13, 14, 15,
AL0 – AL2
Required
settings:
C041, C111
Notes:
•
The default value is 100%. To change the
level from the default, set C041 or
C111(overload level).
• The accuracy of this function is the same as
the function of the output current monitor on
the [FM] terminal (see
“Analog Output
Operation” on page 4–62 ).
Set
value
[OL]
Signal
C041
C041
ON ON
t
Current
threshold
power running
regeneration
threshold
RY
+
–
See I/O specs on page 4–9 .
Inverter output terminal circuit
CM2
13 14
15
11
12
Example: (Default output configuration
shown—see page
3–53 .)
OL