Hitachi X200 Series Overload Advance Notice Signal, FM terminal see Analog Output Operation

4−40

Overload Advance Notice Signal

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 operation and during regenerative braking. The output circuits use open-collector transistors, and are active low.

Output current

C041

C041

[OL] 1 signal 0

Threshold

Power running

Regeneration

Threshold

ON ON

t

Operations and Monitoring

Option

Terminal

Function Name

State

Description

Code

Symbol

03

OL

Overload Advance

ON

when output current is more than the set

Notice Signal

threshold for the overload signal

OFF

when output current is less than the set threshold

for the overload signal

Valid for inputs:

11, AL0 – AL2

Example for terminal [11] (default output

Required settings

C041

configuration shown – see page 3-35):

Notes:

Inverter output

• The default value is 100%. To change the level

terminal circuit

OL

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 “Analog Output Operation”

CM2

11

on page 4–55).

• The example circuit for terminal [11] drives a

relay coil. Note the use of a diode to prevent the

RY

negativegoing turn-off spike generated by the

coil from damaging the inverter’s output

transistor.

Example for terminal [AL0], [AL1], [AL2] (requires

output configuration – see page 4-35 and 3-54):

Inverter logic

OL

circuit board

AL0

AL1

AL2

Power

Load

supply

See I/O specs on page 4-6