YASKAWA GA50U Series

13 Troubleshooting
110 YASKAWA TOEPC71061752B GA500 Drive Installation & Primary Operation
Code Name Causes Possible Solutions
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 option card is incorrectly
installed to the drive.
Correctly install the option card to the drive.
The option card is damaged. If the alarm continues and the wiring is
correct, replace the option card.
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.
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 Yaskawa or your nearest
sales representative.
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.
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.