Troubleshooting and fault elimination
Drive behaviour in the event of faults
Fault analysis with the history buffer
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EDKVF93−03 EN 2.0
4.3 Drive behaviour in the event of faults
The controller responds differently to the three possible fault types TRIP, message, or
warning:
TRIP
TRIP (display in keypad XT: )
ƒ Switches the power outputs U, V, W to a high−resistance state until TRIP reset is
executed.
ƒ The fault indication is entered into the history buffer as "current fault" in C0168/1.
ƒ The drive coasts without any control!
ƒ After TRIP reset (% 43):
– The drive travels along the ramps to its setpoint.
– The fault indication is moved to C0168/2 as "last fault".
Messages
Message (display in keypad XT: )
ƒ Switches the power outputs U, V, W to a high−resistance state.
ƒ The fault indication is entered into the history buffer as "current fault" in C0168/1.
ƒ In case of a fault £5 s:
– The drive coasts without any control as long as the message is active!
– If the message is not active anymore, the drive travels to its setpoint with
maximum torque.
ƒ In case of a fault > 5 s:
– The drive coasts without any control as long as the message is active!
– If the message is not active anymore, the drive travels to its setpoint along the
adjusted ramps.
ƒ If the message is not active anymore, the fault indication is moved to C0168/2 as
"last fault".
Warnings
"Heatsink overtemperature" (keypad XT:OH )
ƒ The drive continues to travel in a controlled way!
ƒ The warning signal goes off when the fault is not active anymore.
"Error in motor phase" (keypad XT:LP1)
"PTC monitoring" (keypad XT:OH51)
ƒ The drive continues to travel in a controlled way!
ƒ The fault indication is entered into the history buffer as "current fault" in C0168/1.
ƒ After TRIP reset, the fault indication is moved to C0168/2 as "last fault".
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