Hitachi L200 사용자 설명서

Using Intelligent Output Terminals

Oper

ations

and Monitor

ing

When the output current exceeds a preset 
value, the [OL] terminal signal turns ON. 
The parameter C041 sets the overload 
threshold. The overload detection circuit 
operates during powered motor opera-
tion and during regenerative braking. The 
output circuits use open-collector 
transistors, and are active low.

[OL] 

Signal

1
0

ON

t

ON

Current

threshold

regeneration

power running

threshold

C041

C041

03

OL

Overload Advance 
Notice Signal

ON

when output current is more than the set thresh-
old for the overload signal

OFF

when output current is less than the set threshold 
for the overload signal

11, 12, AL0 – AL2

C041

The default value is 100%. To change the level 
from the default, set C041 (overload level).

The accuracy of this function is the same as the 
function of the output current monitor on the [FM] 
terminal (see 

The example circuit for terminal [12] 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.

RY

+
–

Example (requires output configuration—
see page 

Inverter output 
terminal circuit

OL

Example for terminals [AL0], [AL1], [AL2] 
(requires output configuration—
see pages 

 and 

AL0

AL2

AL1

Inverter logic 
circuit board

See I/O specs 
on page 

OL

Load

Power

supply

12 11

CM2