Mitsubishi FR-S500 Instruction Manual download pdf (Page 151)

142

(3) Warnings

Operation Panel Indication OL FR-PU04 OL

Name Stall prevention (overcurrent)

During

acceleration

If a current of more than 150% (* 4) of the rated

inverter current flows in the motor, this function

stops the increase in frequency until the overload

current reduces to prevent the inverter from

resulting in overcurrent shut-off. When the

overload current has reduced below 150%, this

function increases the frequency again.

During

constant-

speed

operation

If a current of more than 150% (* 4) of the rated

inverter current flows in the motor, this function

lowers the frequency until the overload current

reduces to prevent overcurrent shut-off. When the

overload current has reduced below 150%, this

function increases the frequency up to the set

value.

Description

During

deceleration

If a current of more than 150% (* 4) of the rated

inverter current flows in the motor, this function

stops the decrease in frequency until the overload

current reduces to prevent the inverter from

resulting in overcurrent shut-off. When the

overload current has reduced below 150%, this

function decreases the frequency again.

Check point Check the motor for use under overload.

Corrective action

The acceleration/deceleration time may change.

Increase the stall prevention operation level with Pr. 22 "stall

prevention operation level", or disable stall prevention with

Pr. 21 "stall prevention function selection".

Check that the torque boost (Pr. 0) setting is not higher than

required.

*4. The stall prevention operation current can be set as desired. It is factory-set to

150%.

Operation Panel Indication oL FR-PU04 oL

Name Stall prevention (overvoltage)

Description

During

deceleration

If the regenerative energy of the motor increases

too much to exceed the brake capability, this

function stops the decrease in frequency to prevent

overvoltage shut-off. As soon as the regenerative

energy has reduced, deceleration resumes.

Check point Check for sudden speed reduction.

Corrective action

The deceleration time may change. Increase the deceleration

time using Pr. 8 "deceleration time".

1 2 ... 146 147 148 149 150 151 152 153 154 155 156 ... 190 191

Comments to this Manuals

No comments

Mitsubishi FR-S500 Instruction Manual Page 151

Comments to this Manuals

Related products and manuals for Power supply units Mitsubishi FR-S500