7.5 Minor Faults/Alarms
274 SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
Code Name Causes Possible Solutions
The option card is damaged. If the fault continues and the wiring is correct, replace the option
card.
Note:
• The drive detects this error if the Run command or frequency reference is assigned to the option card.
• If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =
Alarm] will be ON.
• If the drive detects this error, the drive will operate the motor as specified by the stopping method set in Comm.Error Selection.
Code Name Causes Possible Solutions
CALL Serial Comm Transmission Error
The communications cable wiring is incorrect. Correct any wiring errors.
There is a short circuit or the communications cable
is not connected.
• Repair short circuits and connect cables.
• Replace the defective communications cable.
There was a programming error on the controller
side.
Examine communications at start-up and correct programming
errors.
The communications circuitry is damaged. • Do a self-diagnostics check.
• If the problem continues, replace the control board or the
drive. For information about replacing the control board,
contact the manufacturer or your nearest sales representative.
The termination resistor setting for Modbus
communications is incorrect.
On the last drive in a Modbus network, set DIP switch S2 to the
ON position to enable the termination resistor.
Note:
• The drive detects this error if it does not correctly receive control data from the controller when energizing the drive.
• If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =
Alarm] will be ON.
Code Name Causes Possible Solutions
CE Modbus Communication Error
The communications cable wiring is incorrect. Correct wiring errors.
There is a short circuit or the communications cable
is not connected.
• Repair short circuits and connect cables.
• Replace the defective communications cable.
Electrical interference caused a communication data
error.
• Examine the control circuit lines, main circuit lines, and
ground wiring, and decrease the effects of electrical
interference.
• Make sure that a magnetic contactor is not the source of the
electrical interference, then use a Surge Protective Device if
necessary.
• Use only recommended cables or other shielded line. Ground
the shield on the controller side or the drive input power side.
• Separate the communication wiring from drive power lines,
and install a noise filter to the input side of the power supply
for communication.
• Decrease the effects of electrical interference from the
controller.
The communication protocol is not compatible. • Examine the values set in H5-xx.
• Examine the settings on the controller side and correct the
difference in communication conditions.
The value set in H5-09 [Mbus CE Detect Time] is
too small for the communications cycle.
• Change the controller software settings.
• Increase the value set in H5-09.
The controller software or hardware is causing a
communication problem.
Examine the controller and remove the cause of the problem.
Note:
• The drive detects this error if it does not correctly receive control data for the CE detection time set to H5-09.
• If detected, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection = Alarm] will
switch ON.
• If the drive detects this error, the drive will operate the motor as specified by the stopping method set in H5-04 [Mbus Error Stop].
Code Name Causes Possible Solutions
CP1 Comparator 1 Limit Error
The monitor value set in H2-20 [Compare1 Mon.
Selection] was in the range of H2-21 [Compare1
Low Limit] and H2-22 [Compare1 Up Limit].
Examine the monitor value and remove the cause of the error.
Note:
• The drive detects this error when the terminal is assigned to H2-01, H2-02, and H2-03 = 3C [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct
SelectionComparator1].
• If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =
Alarm] will be ON.
• H2-33 [Compare1 Protection Selection[ enables and disables CP1 detection.
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