Hitachi WJ200-001S Instruction Manual page 264

Overload Advance Notice Signal
When the output current exceeds a
preset value, the [OL] terminal
signal turns ON. The parameter
and sets the overload

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
Notice Signal

OL2 Overload Advance
Notice Signal
11, 12, AL0 – AL2
Valid for inputs:
,
Required settings
Notes:
 The default value is 100%. To change the level

from the default, set

(overload level (2)).
 The accuracy of this function is the same as the
function of the output current monitor on the [AM]
"Analog Output Operation" on page
terminal (see
4–90).
 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.
Function Name State
ON
OFF
ON
OFF

(overload level) and/or
Output
current
/
/
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 3-89):
OL
11
RY
page 4-51 and 3-91):
OL
AL1 AL2
Load
t