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Errors (Alarms)
ERRORS AND PROTECTIVE FUNCTIONS
6
Operation Panel
Indication
E.OS FR-PU04V Overspeed occurrence
Name
Overspeed occurrence
Description
Indicates that the motor speed has exceeded the overspeed setting level.
Check point
• Check that the Pr. 374 "overspeed detection level" value is correct.
• Check that the number of PLG pulses differ from the actual number of PLG pulses.
Corrective action
• Set the Pr. 374 "overspeed detection level" value correctly.
• Set the correct number of PLG pulses in Pr. 851.
Operation Panel
Indication
E.OSD FR-PU04V Excessive speed deflection
Name
Speed deviation excess detection
Description
Stops the inverter output if the motor speed is increased or decreased under the influence of the
load etc. during vector control and cannot be controlled in accordance with the speed command
value.
Check point
• Check that the Pr. 870 "speed deviation level" and Pr. 871 "speed deviation time" values are
correct.
• Check for sudden load change.
• Check that the number of PLG pulses differ from the actual number of PLG pulses.
Corrective action
• Set the Pr. 870 "speed deviation level" and Pr. 871 "speed deviation time" values correctly.
• Keep load stable.
• Set the correct number of PLG pulses in Pr. 851.
Operation Panel
Indication
E.ECT FR-PU04V No encoder signal
Name
Open cable detection
Description
Stops the inverter output if the PLG signal is shut off.
Check point
• Check for an open cable of the PLG signal.
• Check that the PLG specifications are correct.
• Check for a loose connector.
• Check that the jumper connector of the rear of the control terminal is correctly set.
Corrective action
• Remedy the open cable.
• Use the PLG that meets the specifications.
• Make connection securely.
• Set the jumper connector of the rear of the control terminal correctly. (Refer to page 12.)
Operation Panel
Indication
E.OD FR-PU04V Excessive position error
Name Position error large
Description
Indicates that the difference between the position command and position feedback exceeded the
reference.
Check point
• Check that the position detecting encoder mounting orientation matches the parameter.
• Check that the load is not large.
• Check that the Pr. 427 "error excess level" and Pr. 851 "number of PLG pulses" values are
correct.
Corrective action
• Check the parameters.
• Reduce the load weight.
• Set the Pr. 427 "error excess level" and Pr. 851 "number of PLG pulses" values correctly.
Operation Panel
Indication
E.ECA FR-PU04V No encoder A signal
Name
Orientation encoder no-signal
Description
The encoder pulse for the FR-V5AM or FR-A5AP is not input.
Check point
• Check that the FR-V5AM or FR-A5AP is connected correctly.
• Check for a loose connector.
• Check for an open cable.
• Check for a detector fault.
Corrective action
• Make connection securely.
• Change the cable.
• Replace the detector.