Hitachi L200 Manual Do Utilizador

L200 Inverter

Conf

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Dr
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The “B” Group of functions and parameters adjust some of the more subtle but useful 
aspects of motor control and system configuration.

The restart mode determines how the inverter will resume operation after a fault causes a 
trip event. The four options provide advantages for various situations. Frequency 
matching allows the inverter to read the motor speed by virtue of its residual magnetic 
flux and restart the output at the corresponding frequency. The inverter can attempt a 
restart a certain number of times depending on the particular trip event:

• Over-current trip, restart up to 3 times

• Over-voltage trip, restart up to 3 times

• Under-voltage trip, restart up to 16 times

When the inverter reaches the maximum number of restarts (3 or 16), you must power 
cycle the inverter to reset its operation.

Other parameters specify the allowable under-voltage level and the delay time before 
restarting. The proper settings depend on the typical fault conditions for your applica-
tion, the necessity of restarting the process in unattended situations, and whether restart-
ing is always safe.

 

Input 

power

Motor 

speed

Power fail

t

0

0

0

Inverter 

output

free-running

Input 

power

Motor 

speed

t

0

0

0

Inverter 

output

free-running

Allowable

power fail time

Retry wait time

Power fail

Allowable

power fail time

B002

B002

B003