Hitachi CP-X200 instruction manual －42, Overload Advance Notice Signal

4－42

442

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

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

andOperations Monitoring	Monitoring
and
Operations

Valid for inputs:	11, AL0 – AL2
Required settings	C041

Notes:

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

ξThe 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 4–55).

ξThe 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.

Example for terminal [11] (default output configuration shown – see page 3-35):

Inverter output
terminal circuit		OL
	CM2		11

RY

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