Overload Advance Notice Signal - Hitachi WJ200 Series Instruction Manual

Overload Advance Notice Signal

When the output current exceeds a
preset value, the [OL] terminal
signal turns ON. The parameter
and
C041 C111
threshold. (Two thresholds can be
set.) The overload detection circuit
operates during powered motor
operation and during regenerative
braking. The output circuits use
open-collector transistors, and are
active low.
Option Terminal
Code Symbol
OL Overload Advance
03
Notice Signal
OL2 Overload Advance
26
Notice Signal
11, 12, AL0 – AL2
Valid for inputs:
C041,
Required settings
Notes:
• The default value is 100%. To change the level
from the default, set C041
C111 (overload level (2)).
• 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
4–55).
• The example circuit for terminal [11] 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.
sets the overload
Function Name State
ON
OFF
ON
OFF
C111
(overload level) and/or
Output
current
C041/C111
C041/C111
Threshold
[OL]/[OL2] 1
ON
signal
0
Description
when output current is more than the set threshold
for the overload signal
when output current is less than the set threshold
for the overload signal
(Same as above)
(Same as above)
Example for terminal [11] (default output
configuration shown – see
Inverter output
terminal circuit
CM2
Example for terminal [AL0], [AL1], [AL2] (requires
output configuration – see
Inverter logic
circuit board
AL0
Power
supply
See I/O specs on page 4-6
4−57
Threshold
Power running
Regeneration
ON
page 3-90):
OL
11
RY
page 4-52 and 3-90):
OL
AL1 AL2
Load
t