Omron J7 series, Руководство пользователя

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121
Protective and Diagnostic Functions
Chapter 8-1
8-1-2 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.
Warning Displays and Processing
Fault display Warning name and Meaning Probable cause and remedy
uU
(flashing)
Main Circuit Undervoltage (UV)
The main circuit DC voltage has reached
the undervoltage detection level
(200 V DC for the CIMR-J7AZ-2
_
,
160 V DC for the CIMR-J7AZ-B
_
, and
400 V DC for the CIMR-J7AZ-4
_
).
• 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.
%U
(flashing)
Main Circuit Overvoltage
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.).
• The power supply voltage is too high.
→
Decrease the voltage so it will be within
specifications.
%h
(flashing)
Radiation fin overheated (OH)
The temperature of the radiation fins of the
Inverter has reached 110°C ± 10°C.
• The ambient temperature is too high.
→
Ventilate the Inverter or install a cooling unit.
cal
(flashing)
Communications standby (CAL)
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.
• 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.
%l3
(flashing)
Overtorque detection (OL3)
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.
• 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.
ser
(flashing)
Sequence error (SER)
A sequence change has been input while
the Inverter is in operation. Local or remote
selection is input while the Inverter is in
operation.
Note The Inverter coasts to a stop.
• A sequence error has occurred.
→
Check and adjust the local or remote selection
sequence as multi-function input.
bb
(flashing)
External base block (bb)
The external base block command has
been input.
Note The Inverter coasts to a stop.
• The external base block command has been in-put
as multi-function input.
→
Remove the cause of external base block input.
• The sequence is incorrect.
→
Check and change the external fault input sequence
including the input timing and NO or NC contact.