6.6 Minor Faults/Alarms
498 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
Code Name Causes Possible Solutions
The option card is damaged. If the alarm 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 set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• If the drive detects this error, it will operate the motor as specified by the stopping method set in F6-01 [Communication Error Selection].
Code Name Causes Possible Solutions
bUSy Busy
You set the drive to use MEMOBUS/Modbus
communications to change parameters, but you used
the keypad to change parameters.
Use MEMOBUS/Modbus communications to enter the enter
command, then use the keypad to change the parameter.
You tried to change a parameter while the drive was
changing setting.
Wait until the process is complete.
Code Name Causes Possible Solutions
CALL Serial Comm Transmission Error
The communications cable wiring is incorrect. Correct wiring errors.
There is a short circuit in the communications cable
or the communications cable is not connected.
• Repair the short-circuited or disconnected portion of the cable.
• Replace the defective communications cable.
A programming error occurred on the controller side. Examine communications at start-up and correct programming
errors.
There is damage to the communications circuitry. • Do a self-diagnostics check.
• If the problem continues, replace the control board or the drive.
Contact Yaskawa or your nearest sales representative to replace
the control board.
The termination resistor setting for MEMOBUS/
Modbus communications is incorrect.
On the last drive in a MEMOBUS/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 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• Parameter H5-33 [Power-up CALL Alarm] enables or disables the detection of this alarm at power-up.
Code Name Causes Possible Solutions
CE Modbus Communication Error
The communications cable wiring is incorrect. Correct wiring errors.
There is a short circuit in the communications cable
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 the 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 [CE Detection 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:
• This alarm is a different alarm from CE [Run at H5-34 (CE Go-To-Freq)]. The keypad will show this alarm when:
–H5-04 ≠4 [Communication Error Stop Method ≠Run at H5-34 (CE Go-To-Freq)]
–H5-04 = 4 but the drive cannot operate at the selected frequency
• The drive detects this error if it does not correctly receive control data for the CE detection time set to H5-09.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• If the drive detects this error, it will operate the motor as specified by the stopping method set in H5-04.
Code Name Causes Possible Solutions
CE Run at H5-34 (CE Go-To-Freq)
The communications cable wiring is incorrect. Correct wiring errors.
There is a short circuit in the communications cable
or the communications cable is not connected.
• Repair short circuits and connect cables.
• Replace the defective communications cable.
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