Hitachi WJ200-001L, Instruction Manual, Page: 264 / 680

4

57
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
Code
Terminal
Symbol
Function Name State Description

OL Overload Advance
Notice Signal ON when output current is more than the set threshold
for the overload signal
OFF when output current is less than the set threshold
for the overload signal

OL2 Overload Advance
Notice Signal ON (Same as above)
OFF (Same as above)
Valid for inputs:
11, 12, AL0
– AL2
Example for terminal [11] (default output
configuration shown
– see
page 3-89 ):
Example for terminal [AL0], [AL1], [AL2] (requires
output configuration
– see
page 4-51 and 3-91 ):
See I/O specs on
page 4-6
Required settings

,

Notes:

The default value is 100%. To change the level
from the default, set

(overload level) and/or

(overload level (2)).

The accuracy of this function is the same as the
function of the output current monitor on the [AM]
terminal (see
“Analog Output Operation” on page
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.
t
Output
current
Threshold
Threshold
Power running
Regeneration
0
1 [OL]/[OL2]
signal
ON ON

/


/

RY
Inverter output
terminal circuit
CM2 11
OL
AL1
Power
supply
Load
AL0 AL2
Inverter logic
circuit board OL