Trial Operation Procedures
4-
17
Operation using the Digital Operator
•
Use the Digital Operator to start operation in LOCAL mode in the same way as in no-load operation.
•
If fault occurs during operation, make sure the STOP Key on the Digital Operator is easily accessible.
•
At first, set the frequency reference to a low speed of one tenth the normal operating speed.
Checking Operating Status
•
Having checked that the operating direction is correct and that the machine is operating smoothly at slow
speed, increase the frequency reference.
•
After changing the frequency reference or the rotation direction, check that there is no oscillation or abnor-
mal sound from the motor. Check the monitor display to ensure that U1-03 (Output Current) is not too
high.
•
Refer to
Adjustment Suggestions
on page 4-18 if hunting, vibration, or other problems originating in the
control system occur.
Check and Recording User Constants
Use verify mode (i.e., when the VERIFY indicator on the Digital Operator is lit) to check user constants that
have been changed for trial operation and record them in a user constant table.
Any user constants that have been change by autotuning will also be displayed in verify mode.
If required, the copy function in constants o3-01 and o3-02 displayed in advanced programming mode can be
used to copy the changed settings from the Inverter to a recording area in the Digital Operator. If changed set-
tings are saved in the Digital Operator, they can be easily copied back to the Inverter to speed up system
recovery if for any reason the Inverter has to be replaced.
The following functions can also be used to manage user constants.
•
Recording user constants
•
Setting access levels for user constants
•
Setting a password
Recording User Constants (o2-03)
If o2-03 is set to 1 after completing trial operation, the settings of user constants will be saved in a separate
memory area in the Inverter. Later, after Inverter settings have been changed, the user constants can be initial-
ized to the settings saved in the separate memory area when o2-03 was set to 1 by setting A1-03 (Initialize) to
1110.
User Constant Access Levels (A1-01)
A1-01 can be set to 0 (monitoring-only) to prevent user constants from being changed. A1-01 can also be set
to 1 (User-specified Constants) and used along with A2 constants to display only constants required by the
machine or application in a programming mode.
Password (A1-04 and A1-05)
When the access level is set to monitoring-only (A1-01 = 0), a password can be set so that user constants will
be displayed only when the correct password is input.
