Hitachi L700 Series

Chapter 4 Explanation of Functions
4 - 86
4.2.91 Offline auto-tuning function
The offline auto-tuning function allows you to make the inverter
automatically measure and set the motor constants that are
required for the sensorless vector control, 0Hz-range sensorless
vector control, and vector control with sensor.
When using the inverter to perform the sensorless vector control,
0Hz-range sensorless vector control, and vector control with sensor
for a motor of which the motor constants are unknown, measure the
motor constants with the offline tuning function.
When "00" (Hitachi general-purpose motor data) is specified for the
motor constant selection (H002/H202), the motor constants of
Hitachi's general-purpose motors are set as defaults. When you drive a Hitachi's general-purpose motor
with the inverter, you can usually obtain the desired motor characteristics without problems. (If you cannot
obtain the desired characteristics, adjust the motor constant settings as described in Section 4.2.92 or
4.2.93.)
If you intend to use the online tuning function described later, be sure to perform offline auto-tuning
beforehand.
The offline auto-tuning function applies only to the 1st motor and 2nd motor controls. Do not apply this
function to the 3rd motor control.
The motor constant data corresponding to the date of one phase of γ connection at 50 Hz.
You should use off-line auto-tuning first by using factory default settings as long as you can .
(There are some unusable functions and settings when using off line auto-tuning. Please see the following
notices in detail.)
Item Function code Data or range of data Description
Auto-tuning Setting H001
00 Disabling the auto-tuning
01
Enabling the auto-tuning (without
motor rotation)
02
Enabling the auto-tuning (with motor
rotation)
Motor data selection H002/H202
00 Hitachi general-purpose motor data
01 Automatically tuned data
02
Automatically tuned data (online
auto-tuning enabled)
Motor capacity H003/H203 0.2 to 90.0 (kW) <0.2 to 160(kW)>
Note)<>:applied for 90 to 160kW
Motor poles setting H004/H204 2, 4, 6, 8, or 10 (poles)
Auto constant R1 H030/H230 0.000 to 65.53 (Ω)
Auto constant R2 H031/H231
0.000 to 65.53 (Ω)
Auto constant L H032/H232 0.00 to 655.3 (mH)
Auto constant Io H033/H233 0.00 to 655.3 (A)
Auto constant J H034/H234
0.001 to 9999. (kgm
2
)
Base frequency
setting
A003/A203
30 to maximum frequency setting
(Hz)
DC braking enable A051
00 Disabling DC braking
01 Enabling DC braking
AVR voltage select A082
200, 215, 220, 230, or 240
Selectable only for 200 V class
models
380, 400, 415, 440, 460, or 480
Selectable only for 400 V class
models
When using this function, follow the instructions below.
1)Adjust the settings of base frequency (A003) and AVR voltage select (A082) to the motor specifications.
When motor voltage is other than the altanatives, set as ”motor voltage (A082) “ * ”outputr voltage gain
(A045) “ = “motor rated voltage” Please set 00 (constant torque characteristic[VC]) to V/F control
mode(A044), and do not set free V/F setting(02). If you set free V/F setting (A044), auto-tuning function
does not work.(see note 6)
2) This function can properly apply to only the motors in the maximum applicable capacity class of your
inverter or one class lower than the capacity class of your inverter. If this function is used for motors with
other capacities, correct constant data may not be obtained. (In such cases, the auto-tuning operation
may not be completed. If the auto-tuning operation is not completed, press the STOP/RESET key. The
operation will end with an error code displayed.)
H001: Auto-tuning Setting
H002/H202: Motor data selection, 1st motor
H003/H203: Motor capacity, 1st motor
H004/H204: Motor poles setting, 1st motor
H030/H230: Auto constant R1, 1
st
/2
nd
motor
H031/H231: Auto constant R2, 1
st
/2
nd
motor
H032/H232: Auto constant L, 1
st
/2
nd
motor
H033/H233: Auto constant Io, 1
st
/2
nd
motor
H034/H234: Auto constant J, 1
st
/2
nd
motor
A003/A203: Base frequency setting
A051: DC braking selection
A082: AVR voltage select
b046: Reverse run proctection enable
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