User Notification Codes
The User Notification codes appear on the Frequency Command screen while the associated function is active.
User Notification codes notify the user of active functions that are usually only momentary under normal conditions and are active for the duration of activation only. User notification events are not error conditions and only convey active system functions to the user.
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| Table 12 |
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EOI | Function | Description |
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Atn | Autotune Active | Atn indicates that the Autotune function is active. If the initial |
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| Autotune fails for any reason, an automatic retry is initiated if Other |
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| Motor is selected at parameter 0413. |
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db or dbOn | DC Braking Active | This code conveys that the DC Injection function being carried out. |
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| The display shows db when braking and dbOn when the Shaft |
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| Stationary function is active. |
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Trips/Faults
A Trip is an ASD response to a Fault (though, Fault and Trip are sometimes used interchangeably). A Trip is a safety feature that disables the ASD system in the event that a subsystem of the ASD is malfunctioning.
Listed in Table 13 are the possible Faults that may cause a Trip and the possible causes. When a Trip is incurred the system displays the Fault screen. The Fault screen identifies the active Fault.
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| Table 13 |
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Fault Screen Display | Possible Causes | |
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Inverter (ASD) OL |
| • Acceleration time is too short. |
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| • DC Injection current is too high. |
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| • V/f setting needs to be adjusted. |
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| • Motor running during restart. |
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| • ASD or the motor is improperly matched to the application. |
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Autotuning Err |
| • Autotune readings that are significantly inconsistent with the configuration |
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| information. |
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| • A |
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| • Incorrect settings at parameter 0400, 0413, or 0414. |
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| • Using a motor that has a significantly smaller rating than the ASD. |
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| • ASD output cabling is too small, too long, or is being housed in a cable tray with |
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| other cables that are producing an interfering EMF. |
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| • Motor is running during the Autotune function. |
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Note: | The event that caused the Trip(s) must be corrected or must decrease to less than the threshold | |
| value required to cause the trip to allow for a Reset to be recognized. In the event of multiple | |
| active trips, the trip displayed will remain until all faults are corrected and all trips are cleared. | |
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W7 ASD Installation and Operation Manual | 149 |
