Hitachi L2002 Manual Do Utilizador

L200

2

 Inverter

Conf

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The RUN and PRG LEDs tell just part of the story; 
Run Mode and Program Modes are independent 
modes, not opposite modes. In the state diagram to 
the right, Run alternates with Stop, and Program 
Mode alternates with Monitor Mode. This is a very 
important ability, for it shows that a technician can 
approach a running machine and change some 
parameters without shutting down the machine.

The occurrence of a fault during operation will 
cause the inverter to enter the Trip Mode as shown. 
An event such as an output overload will cause the 
inverter to exit the Run Mode and turn OFF its 
output to the motor. In the Trip Mode, any request 
to run the motor is ignored. You must clear the 
error by pressing the Stop/Reset switch. See 

.

The inverter can be in Run Mode (inverter output is controlling motor) and still allow 
you to edit certain parameters. This is useful in applications that must run continuously.

The parameter tables in this chapter have a column titled “Run 
Mode Edit.” An Ex mark 

✘ means the parameter cannot be 

edited; a Check mark 

✔ means the parameter can be edited. 

The table example to the right contains two adjacent marks
 “

✘ ✔”. These two marks (that can also be“✘ ✘” or “✔ ✔”) 

correspond to low-access or high-access levels to Run Mode 
edits (note Lo and Hi in column heading).

The Software Lock Setting (parameter B031) determines when Run Mode access is in 
effect and access permission in other conditions, as well. It is the responsibility of the 
user to choose a useful and safe software lock setting for the inverter operating condi-
tions and personnel. Please refer to 

The motor control program in the L200

2

 

inverter has two sinusoidal PWM switching 
algorithms. The intent is that you select the 
best algorithm for the motor characteristics 
in your application. Both algorithms
generate the frequency output in a unique 
way. Once configured, the algorithm is the 
basis for other parameter settings as well 
(see 

). Therefore, choose the best 

algorithm early in your application design 
process.

RESET

FUNC.

Fault

Fault

RESET

RESET

✘ ✔

Output

Variable freq. control,

constant torque

Variable freq. control,

reduced torque