Omron 3G3JV Manual page 29

Simple speed control compact inverters with easy-to-use functions
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Protective and Diagnostic Functions
Fault display
Fault name and meaning
Communications time-over (CE)
Normal RS-422A/485 communications
were not established within 2 s. The
Inverter will detect this error if n68
(RS-422A/485 communications
time-over detection selection) is set to
0, 1, or 2.
Emergency stop (STP)
An emergency stop alarm is input to a
multi-function input. (A multi-function
input 1, 2, 3, or 4 set to 19 or 21 has
operated.)
OFF
Power supply error
• Insufficient power supply voltage
• Control power supply fault
• Hardware fault
Warning Detection (Nonfatal Error)
The warning detection is a type of Inverter protective function that does not operate the fault contact output and returns the Inverter to
its original status once the cause of the error has been removed. The Digital Operator flashes and display the detail of the error. If a
warning occurs, take appropriate countermeasures according to the table below.
Note: Some warnings or some cases stop the operation of the Inverter as described in the table.
Fault display
Warning name and Meaning
Main Circuit Undervoltage (UV)
(flashing)
The main circuit DC voltage has
reached the undervoltage detection
level (200 V DC for the 3G3JV-A2j,
160 V DC for the 3G3JV-ABj, and 400
V DC for the 3G3JV-A4j).
Main Circuit Overvoltage
(flashing)
The main circuit DC voltage has
reached the overvoltage detection level
(200-V models: 410 V DC min.; 400-V
models: 820 V DC min.).
Radiation fin overheated (OH)
(flashing)
The temperature of the radiation fins of
the Inverter has reached 110_C ±
10_C.
Communications standby (CAL)
(flashing)
No normal DSR message has been
received during RS-422A/4895
communications.
The Inverter detects this warning only
when RUN command selection (n02) is
set to 2 or frequency reference
selection (n03) is set to 6. Until the
warning is reset, no input other than
communications input will be ignored.
Overtorque detection (OL3)
(flashing)
There has been a current or torque the
same as or greater than the setting in
n60 for overtorque detection level and
that in n61 for overtorque detection
time. A fault has been detected with
n59 for overtorque detection function
selection set to 1 or 3.
• A short-circuit, ground fault, or disconnection has occurred on the communications line.
Check and correct the line.
• The termination resistance setting is incorrect.
Set the termination resistance of only the Inverter located at each end of the network to ON.
• Noise influence.
Do not wire the communications line along with power lines in the same conduit.
Use the twisted-pair shielded wire for the communications line, and ground it at the Master.
• Master's program error.
Check and correct the program so that communications will be performed more than once every
2-s period.
• Communications circuit damage.
If the same error is detected as a result of a self-diagnostic test, change the Inverter.
• An emergency stop alarm is input to a multi-function input.
Remove the cause of the fault.
• The sequence is incorrect.
Check and change the external fault input sequence including the input timing and NO or NC
contact.
• No power supply is provided.
Check and correct the power supply wire and voltage.
• Terminal screws are loosened.
Check and tighten the terminal screws.
• The Inverter is damaged.
Replace the Inverter.
• Power supply to the Inverter has phase loss, power input terminal screws are loose, or the power
line is disconnected.
Check the above and take necessary countermeasures.
• Incorrect power supply voltage
Make sure that the power supply voltage is within specifications.
• The power supply voltage is too high.
Decrease the voltage so it will be within specifications.
• The ambient temperature is too high.
Ventilate the Inverter or install a cooling unit.
• A short-circuit, ground fault, or disconnection has occurred on the communications line.
Check and correct the line.
• The termination resistance setting is incorrect.
Set the termination resistance of only the Inverter located at each end of the network to ON.
• Master's program error.
Check the start of communications and correct the program.
• Communications circuit damage.
If a CAL or CE error is detected as a result of a self-diagnostic test, change the Inverter.
• The mechanical system is locked or has a failure.
Check the mechanical system and correct the cause of overtorque.
• The parameter settings were incorrect.
Adjust the n60 and n61 parameters according to the mechanical system.
Increase the set values in n60 and n61.
Probable cause and remedy
Probable cause and remedy
31

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