Delta PG-40 Specifications download pdf (Page 87)

VFD-B Series

5-52

Output frequency

(H)

Output voltage

(V)

FWD Run

B.B.

Fig 3: B.B. Speed Search with Minimum Output Frequency Upward Timing Chart

(

Start-up Current Attains Stall Current Level

)

Time

Stop output voltage

Disable B.B. signal

Waiting time 08-06

Restart

Stall prevention

06-01

Over current

stall prevention

during acceleration

Keep accelerating

08 - 19

Speed Search during Start-up

Factory Setting: 00

Settings 00 Speed search disable

01 Speed search enable



This parameter is used for starting and stopping a motor with high inertia. A motor with

high inertia will take a long time to stop completely. By setting this parameter, the user

does not need to wait for the motor to come to a complete stop before restarting the AC

drive. If a PG card and encoder is being used on the drive and motor, then the speed

search will start from the speed that is detected and accelerate quickly to the

commanded frequency. Pr.08-04 and Pr.08-06 will be disabled when using this

parameter with PG feedback control.

Note: Please make sure Pr.07-04, Pr.10-10, and Pr.10-11 are set correctly. An incorrect

setting may cause the motor to exceed its speed limit and permanent damage to the

motor and machine can occur.

08 - 20

Speed Search Frequency during Start-up

Factory Setting: 00

Settings 00 Setting Frequency

01 Maximum Operation Frequency (01-00)



This parameter determines the start frequency of speed search frequency.

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Delta PG-40 Specifications Page 87

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