Trial Operation Procedures4- 17Operation 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 slowspeed, 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 toohigh.• Refer to Adjustment Suggestions on page 4-18 if hunting, vibration, or other problems originating in thecontrol system occur. Check and Recording User ConstantsUse verify mode (i.e., when the VERIFY indicator on the Digital Operator is lit) to check user constants thathave 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 beused 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 systemrecovery 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 separatememory 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) to1110.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 setto 1 (User-specified Constants) and used along with A2 constants to display only constants required by themachine 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 willbe displayed only when the correct password is input.
