5 output short circuit detection selection, Output short circuit detection selection, Pd t 5 l – Toshiba Tosvert VF-A5 User Manual

Page 86: Lb r c l, U tz

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u r

P I— (Protection Parameters)

5 t C l

U P 5 L

Trip function selections

1 1

L_ L-

D t 5 L

u tz

b r C L

Related parameters

5 L C 1

Stall protection

S t L 1

U P 5 L

Undervoltage trip selection

U P t

L L P

Low current detection selection

L L P t

L L P C

Low current detection level

b r C L

D t S L

Overtorque trip selection

D L L

Stall protection level

Undervoltage detection time

Low current detection time

Fault trip saving

Overtorque trip level

The stall protection, undervoltage trip, low current detection and overtorque trip functions can be selectively

enabled/disabled.

Parameter

Standard

setting

Function

When set to 1

5 b C 1

Stall protection ON.

Stall protection OFF.

U P S L

Undervoltage trip disabled.

Undervoltage trip enabled.

L L P

Low current trip disabled.

Low current trip enabled.

D t 5 L

Overtorque trip disabled.

Overtorque trip enabled.

★ By setting the fault trip saving function | t: r CL , when a trip occurs, whether or not the trip will be

maintained or cleared when the inverter is powered OFF can be selected.

A low current condition is detected when the inverter output current is less than the

low current detection level | L L P C~| for a duration exceeding the low current

detection time

L L P t

I J

n I

5 Output short circuit detection selection

This parameter allows the selection of the method for detecting an output short circuit, dependent upon the

motor and usage conditions.

O C L S

set to

D :

Standard ... Detection is executed upon start-up.

D C L 5

set to J : For high-speed motor use ... Because a high-speed motor’s inductance is small, the

detection method is altered to prevent nuisance trips.

D C L 5

set to2 : For positioning ... Detection is performed during initialization after power is turned ON.

This is used to improve positioning accuracy during JOG, because the

positioning will deviate with the output short-circuit check pulses.

0 C L 5 set to 3 : For high-speed motor positioning

★ This function only changes the method for evaluating an overcurrent trip. Overcurrent protection will still

always be in effect.

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