Schneider Electric 58 TRX Fault Reset Type, Output Phase Loss, Input Phase Loss, Loss of Follower

Altivar® 58 TRX AC Drives

Fault Management Parameters

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.

66

© 2000–2003 Schneider Electric All Rights Reserved 09/2003