Instruction manual

80
Errors (Alarms)
Control Panel
Indication
E.MB1 to 7 FR-PU04V —
Name
Brake sequence error
Description
• The inverter output is stopped when a sequence error occurs during use of the brake sequence
function (Pr. 278 to Pr. 285).
• If (detection frequency) - (output frequency) > Pr. 285 under vector control, E.MB1 occurs and the
inverter output is stopped.
Check point
Find the cause of alarm occurrence.
Corrective action
Check the set parameters and perform wiring properly.
Control 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 encoder pulses differ from the actual number of encoder pulses.
Corrective action
• Set the Pr. 374 "overspeed detection level" value correctly.
• Set the correct number of encoder pulses in Pr. 851.
Control 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 encoder pulses differ from the actual number of encoder 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 encoder pulses in Pr. 851.
Control Panel
Indication
E.ECT FR-PU04V No encoder signal
Name
Signal loss detection
Description
Stops the inverter output if the encoder signal is shut off.
Check point
• Check for the encoder signal loss.
• Check that the encoder 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 break in the cable.
• Use the encoder that meets the specifications.
• Make connection securely.
• Set the jumper connector of the rear of the control terminal correctly. (Refer to page 12.)
Control 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 "excessive level error" and Pr. 851 "number of encoder pulses" values are
correct.
Corrective action
• Check the parameters.
• Reduce the load weight.
• Set the Pr. 427 "excessive level error" and Pr. 851 "number of encoder pulses" values correctly.
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