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Effective when output terminal function selections n40,

are set to “frequency detection (setting : 4 or 5).

“Frequency detection” turns ON when output frequency

is higher or lower than the frequency detection level

(n58).

Frequency detection 1

(Output frequency Frequency

detection level)

(Set n40 to “4”)

FREQUENCY DETECTION

LEVEL (Hz)

(n58)

OUTPUT

FREQUENCY

DETECTION

SIGNAL

RELEASE

WIDTH –2Hz

Frequency detection 2

(Output frequency Frequency

detection level)

(Set n40 to “5”)

FREQUENCY DETECTION

LEVEL (Hz)

(n58)

OUTPUT

FREQUENCY

DETECTION

SIGNAL

ONON

RELEASE

WIDTH +2Hz

This function allows the prohibition or “jumping” of

critical frequencies so that the motor can operate without

resonance caused by machine systems. This function is

also used for dead band control. Setting the value to

0.0Hz disables this function.

Set jump frequency 1, 2 or 3 as follows:

n49 n50

If this condition is not

satisfied the inverter

displays for one

second and restores the

data to original settings.

Note : Gradually changes without

jumping during accel/decel.

n51

n49

n50

n51

OUTPUT FREQUENCY

FREQUENCY REF.

To operate coasting motor without trip, use the speed

search command or DC injection braking at start.

Speed search command

Restarts a coasting motor without stopping it. This

function enables smooth switching between motor

commercial power supply operation and inverter

operation.

Set input terminal function selection (n36 to n39) to

“14” (search command from maximum output

frequency) or “15” (search command from set

frequency).

Build a sequence so that FWD (REV) run command is

input at the same time as the search command or after

the search command. If the run command is input

before the search command, the search command

becomes disabled.

0.5s OR MORE

FWD (REV) RUN

COMMAND

SEARCH COMMAND

OUTPUT FREQUENCY

AGREED SPEED

DETECTION

MAX. OUTPUT FREQUENCY

OR FREQUENCY REF.

AT RUN COMMAND

INPUT

MIN. BASEBLOCK

TIME (0.5sec)

SPEED SEARCH

OPERATION

Time chart at search command input

DC injection braking at start

(n52, n54)

Restarts a coasting motor after

stopping it. Set DC injection

braking time at start in n54 in

units of 0.1 second. Set DC

injection braking current in

n52 in units of 1%. When the

setting of n54 is “0,” DC

injection braking is not performed and acceleration

starts from the minimum output frequency.

n14

MIN. OUTPUT

FREQUENCY

n54

DC INJECTION BRAKING

TIME AT START

Frequency detection

Frequency detection level

N58

Avoiding resonance

Jump frequency 1, 2

Jump width

N51

N50N49

Operating coasting motor without trip

Speed search command

Input terminal function selection to

DC injection braking at start

DC injection braking current

DC injection braking time at start

N54

N52

N39N36

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 43 44

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YASKAWA VS MINI J7 Specifiche Pagina 20

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