Hitachi SJ300 Series Signal, Overload, Advance Notice

4–46

Using Intelligent Output Terminals

Overload

Advance Notice

Signal

When the output current exceeds a preset value, the [OL] or [OL2] terminal signal turns ON. The parameter C041 (or C111, respectively) 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.

	Current						threshold
						power running
Set		C041
value
		C041			regeneration
		[OL]		threshold
		Signal	ON				ON

t

Operations and Monitoring

Opt.

Symbol

Function Name

Output

Description

Code

State

03

OL

Overload advance

ON

when output current is more than the set

notice signal (1)

threshold for the overload signal (C041)

OFF

when output current is less than the set

threshold for the overload signal (C041)

26

OL2

Overload advance

ON

when output current is more than the set

notice signal (2)

threshold for the overload signal (C111)

OFF

when output current is less than the set

threshold for the overload signal (C111)

Valid for

11, 12, 13, 14, 15,

Example: (Default output configuration

outputs:

AL0 – AL2

shown—see page 3–53.)

Required

C041, C111

Inverter output terminal circuit

settings:

OL

Notes:

• The default value is 100%. To change the

level from the default, set C041 or

14

13

11

C111(overload level).

15

CM2

12

• 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 4–62).

+

– RY

See I/O specs on page 4–9.

NOTE: The example circuit in the table above 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.