YASKAWA GA800 Technical Reference page 391

Code Name
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 Select = 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
bUSy Busy
Code Name
CALL Serial Comm Transmission Error
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 Select = Alarm] will activate.
Code Name
CE Modbus Communication Error
Note:
• 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 assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
• If the drive detects this error, it will operate the motor as specified by the stopping method set in H5-04 [Communication Error Stop Method].
Code Name
CP1 Comparator 1 Limit Error
Note:
• The drive detects this error when the terminal is assigned to H2-01 to H2-03 = 66 [MFDO Function Select = Comparator1].
• If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
• H2-33 [Comparator1 Protection Selection] enables and disables CP1 detection.
YASKAWA SIEPC71061737D GA800 Drive Technical Reference
Causes
The option card is damaged.
Causes
You set the drive to use MEMOBUS/Modbus
communications to change parameters, but you used
the keypad to change parameters.
You tried to change a parameter while the drive was
changing setting.
Causes
The communications cable wiring is incorrect.
There is a short circuit in the communications cable
or the communications cable is not connected.
A programming error occurred on the controller side.
There is damage to the communications circuitry.
The termination resistor setting for MEMOBUS/
Modbus communications is incorrect.
Causes
The communications cable wiring is incorrect.
There is a short circuit in the communications cable
or the communications cable is not connected.
Electrical interference caused a communication data
error.
The communication protocol is not compatible.
The value set in H5-09 [CE Detection Time] is too
small for the communications cycle.
The controller software or hardware is causing a
communication problem.
Causes
The monitor value set in H2-20 [Comparator 1
Monitor Selection] was in the range of H2-21
[Comparator 1 Lower Limit] and H2-22
[Comparator 1 Upper Limit].
7.5 Minor Faults/Alarms
Possible Solutions
If the alarm continues and the wiring is correct, replace the option
card.
Possible Solutions
Use MEMOBUS/Modbus communications to enter the enter
command, then use the keypad to change the parameter.
Wait until the process is complete.
Possible Solutions
Correct wiring errors.
• Repair the short-circuited or disconnected portion of the cable.
• Replace the defective communications cable.
Examine communications at start-up and correct programming
errors.
• 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.
On the last drive in a MEMOBUS/Modbus network, set DIP switch
S2 to the ON position to enable the termination resistor.
Possible Solutions
Correct wiring errors.
• Repair short circuits and connect cables.
• Replace the defective communications cable.
• 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.
• Examine the values set in H5-xx.
• Examine the settings on the controller side and correct the
difference in communication conditions.
• Change the controller software settings.
• Increase the value set in H5-09.
Examine the controller and remove the cause of the problem.
Possible Solutions
Examine the monitor value and remove the cause of the error.
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