Hitachi L200 Manual Do Utilizador

L200 Inverter

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When enabled, the built-in PID loop calculates an ideal inverter output value to cause a 
loop feedback process variable (PV) to move closer in value to the setpoint (SP). The 
frequency command serves as the SP. The PID loop algorithm will read the analog input 
for the process variable (you specify the current or voltage input) and calculate the 
output.

• A scale factor in A075 lets you multiply the PV by a factor, converting it into 

engineering units for the process.

• Proportional, integral, and derivative gains are all adjustable.

• See 

 for more information.

NOTE: The setting A073 for the integrator is the integrator’s time constant Ti, not the 
gain. The integrator gain Ki = 1/Ti. When you set A073 = 0, the integrator is disabled.

A071 PID Enable

Enables PID function,
two option codes:
00... PID Disable
01... PID Enable

✘

00

00

—

PID Mode     OFF

A072 PID proportional gain

Proportional gain has a range 
of 0.2 to 5.0

✔

1.0

1.0

—

PID P     0001.0

A073 PID integral time 

constant

Integral time constant has a 
range of 0.0 to 150 seconds

✔

1.0

1.0

sec.

PID I    0001.0s

A074 PID derivative time 

constant

Derivative time constant has a 
range of 0.0 to 100 seconds

✔

0.0

0.0

sec.

PID D    000.00s

A075 PV scale conversion

Process Variable (PV) scale 
factor (multiplier), range of
0.01 to 99.99

✘

1.00

1.00

—

PID Cnv  001.00%

A076 PV source setting

Selects source of Process 
Variable (PV), option codes:
00... [OI] terminal (current in)
01... [O] terminal (voltage in)
02... ModBus network
03... Calculate function output

✘

00

00

—

PID INP       OI

A077 Reverse PID action

Two option codes:
00... PID input = SP – PV
01... PID input = –(SP – PV)

✘

00

00

—

PID MINUS    OFF

A078 PID output limit

Sets the limit of PID output as 
percent of full scale,
range is 0.0 to 100.0%

✘

0.0

0.0

%

PID Vari 0000.0%