Hitachi L100 사용자 설명서

“A” Group: Standard Functions

Configur

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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 
current 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 calcu-
late the output.

• A scale factor in A_75 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 A_73 for the integrator is the integrator’s time constant Ti, not the 
gain. The integrator gain Ki = 1/Ti. When you set A_73 = 0, the integrator is disabled.

A_71 PID Enable

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

✘

00

00

00

—

PID SW       OFF

A_72 PID proportional gain

Proportional gain has a range 
of 0.2 to 5.0

✘

1.0

1.0

1.0

—

PID P        1.0

A_73 PID integral time 

constant

Integral time constant has a 
range of 0.0 to 150 seconds

✘

1.0

1.0

1.0

sec.

PID I     001.0s

A_74 PID derivative time 

constant

Derivative time constant has a 
range of 0.0 to 100 seconds

✘

0.0

0.0

0.0

sec.

PID D       00.0

A_75 PV scale conversion

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

✘

1.00

1.00

1.00

—

PID CONV   01.00

A_76 PV source setting

Selects source of Process 
Variable (PV), option codes:
00 ...[OI] terminal (current in)
01 ...[O] terminal (voltage in)

✘

00

00

00

—

PID INPT     CUR