Schneider Electric ALTIVAR 58 TRX - Manual (Page 66)

Altivar ® 58 TRX AC Drives
Fault Management Parameters
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66
09/2003
The faults which allow automatic restarting are:
• Input mains overvoltage • Drive controller thermal overload
• 4-20 mA speed reference loss • DC bus overvoltage
• External fault • Motor phase loss
• Serial link fault
• Motor thermal overload if thermal state is below 100%
• Mains voltage too low (for this fault, the function is always active, even if it has not been configured).
In the case of this fault, the controller fault relay remains energized if the function is configured, and
the speed reference and the operating direction must be maintained.
Automatic restart is often used in applications where machines or installations are operating
continuously or without supervision and which, when restarted, pose no hazard to either equipment or
personnel (for example, pumps, fans, etc.).
Fault Reset Type
This function allows faults to be reset by logic input (LIx), which can be re-assigned to this function. The
starting conditions after reset are the same as those at a normal power-up.
Two types of reset are available: Type 1 and Type 2. In Type 1, which is often used for applications where
drive controllers are difficult to access (for example, on moving parts in materials handling systems), the
following faults may be reset:
• Overvoltage • Overspeed
• External fault • Drive controller overheating
• Motor phase loss • DC bus overvoltage
• Loss of 4-20 mA speed reference • Serial link fault
• Motor overload if thermal state is below 100%
The mains undervoltage and mains phase loss faults will reset automatically when the supply returns to
normal.
In Type 2, all faults are inhibited, including thermal protection functions except motor short-circuit. This
type is used in applications involving drive controllers where restart could be vital, such as furnace
conveyors, smoke extraction fans, and machines with hardening products which need to be removed.
Output Phase Loss
The output phase loss detection can be disabled. Factory setting is enabled.
Input Phase Loss
The input phase loss detection can be disabled on three phase devices. Factory setting is enabled.
Loss of Follower
The drive controller can be configured to detect a loss of a 4–20 mA speed reference signal. If so
configured, the following responses to the loss of signal can be selected:
• Immediate fault, stop the motor
• Stop the motor without fault and restart on return of the reference signal
• Stop the motor, deenergize the fault relay, and display loss of 4–20 mA speed reference on the
keypad display
• Continue to run at last the speed without fault and follow the speed reference upon return of the signal
• Continue to run, but at a configured preset speed. The adjustable range for the preset speed is from
0 to the high speed setting.