Online Auto-Tuning Function - Hitachi L700 SERIES Instruction Manual

Chapter 4 Explanation of Functions
Note 4: If the inverter trips during the auto-tuning, the auto-tuning is terminated forcibly.
(In such cases, the monitor does not display the abnormal-end code, but displays a trip indication
code.)
In such cases, remove the cause of tripping, and then set H001=01 again to retry the auto-tuning
after turning off power source for the inverter and turn on.
Note 5: If you cancel the auto-tuning midway with a stop command (by pressing the STOP/RESET key or
turning off the operation command), the constants set for auto-tuning may remain in the inverter.
Before retrying the auto-tuning, initialize the inverter, and then readjust the settings for the
auto-tuning. (Perform the same procedure also when you proceed to the normal inverter
operation.)
Before retrying the auto-tuning, initialize the setting parameters of inverter or turn off power source
for the inverter and turn on. And then readjust the settings for the auto-tuning. (Perform the same
procedure also when you proceed to the normal inverter operation.)
Note 6: If an attempt is made to perform the auto-tuning with a free V/f characteristic selected as the
control mode, the inverter will soon terminate the operation with the abnormal-end code displayed.
Note 7: Even if the auto-tuning has ended normally, you cannot operate the inverter with the tuning data
left. If you intend to operate the inverter with the tuning data left, be sure to switch the setting of
motor constant selection (H002) to "01".
Note8: You should not activate any functions set on intelligent terminals 1-8 during auto- tuning. (Set
normal open terminals off, and set normal close terminals on). The working functions on the
intelligent terminals cause abnormal termination. The motor might keep running without run
command in this case. Please restart auto- tuning after turning off power source for the inverter
and turn on again.
Note9: Do not use DC braking. You should set DC-braking selection (A051) invalid for
auto-tuning.
Note10: Do not start auto-tuning with setting servo-on(54:SON )and forcing function(55:FOC) to the
intelligent terminals. You should remove these functions and start auto-tuning in this case. Please
set these functions after normal termination of auto-tuning and confirming good motor rotation.
Note11: If you set control mode(A044) to vector control with sensor(05),you should not set V2 control
mode(P012) to position control mode(01:APR,02:APR2,03:HAPR).Do not also use torque
control ,torque bias control. You should use these functions after normal termination of
auto-tuning and confirming good motor rotation.
Note 12: If auto-tuning has finished , once turn off power source of inverter and turn on.

4.2.92 Online auto-tuning function

The online auto-tuning function allows you to compensate the motor constants for alterations caused by
the rise of motor temperature and other factors to ensure stable motor operation.
The online auto-tuning function applies only to the 1st motor and 2nd motor controls. Do not apply this
function to the 3rd motor control.
Item
Motor constant selection
When using this function, follow the instructions below.
1) Be sure to perform the offline auto-tuning before the online auto-tuning.
2) Since the data for online tuning is calculated by the offline auto-tuning, perform the offline tuning at
least once, even when the inverter is used to drive a Hitachi general-purpose motor.
3) The online auto-tuning operates for a maximum of 5 seconds after the motor has stopped. (DC
excitation is executed once to tune constants R1 and R2. The result of tuning is not reflected in the
data displayed on the monitor.) If an operation command is input during the auto-tuning operation, the
online auto-tuning ends midway because the operation command has priority over the online
auto-tuning. (In such cases, the result of tuning is not reflected in the inverter settings.)
4) When the DC braking at stopping has been specified, the online tuning is performed after the DC
braking operation ends.
5) When FOC, SON terminals are assigned, online auto-tuning is not executed.
Operating procedure
1) Specify "02" (enabling the online auto-tuning) for the motor constant selection "H002". (Specify "00"
[disabling the auto-tuning] for the Auto-tuning Setting "H001".)
2) Input an operation command. (The inverter will automatically perform the online auto-tuning after the
motor stops.)
Function code Data
00
H002/H202 01
02
Hitachi general-purpose motor data
Automatically tuned data
Automatically tuned data (online auto-tuning enabled)
4 - 88
Description