4-13
4
îš„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 a fault occurs during operation, make sure that the STOP key on the Digital Operator is accessible easily.
• At first, set the frequency reference to a low speed, e.g. to one tenth of the normal operating speed.
îš„ 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 Table 4.4 if hunting, vibration, or other problems originated by the control system occur.
îš‹ Check and Recording Parameters
Use the verify mode to check parameters that have been changed for trial operation and record them in a
parameter table.
Any parameters that have been changed by autotuning will also be displayed in the verify mode.
If required, the copy function (parameters o3-01 and o3-02 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 settings 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 parameters.
• Saving user initial parameter values
• Setting access levels for parameters
• Setting a password
îš„ Saving User Initial Parameter Values (o2-03)
• If o2-03 is set to 1 after completing trial operation, the settings of parameters will be saved in a separate
memory area in the inverter. When the Inverter settings have been changed for any reason, the parameters
can be initialized to the settings saved in the separate memory area by setting A1-03 (Initialize) to 1110.
îš„Parameter Access Levels (A1-01)
• A1-01 can be set to 0 (monitoring-only) to prevent parameters from being changed. A1-01 can also be set
to 1 (User-specified Parameters) to display only parameters required by the machine or application in a
programming mode. These parameters can be determined by setting the A2-XX parameters.
îš„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 parameters will
be displayed only when the correct password has been input.
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