YASKAWA FP605 Installation & Primary Operation page 119

Code Name
BuFbl Backup Fdbk Lost Chk/Repl Xducer
bUS Option Communication Error
bUSy Busy
CALL Serial Comm Transmission Error
CE Modbus Communication Error
CE Run at H5-34 (CE Go-To-Freq)
CrST Cannot Reset
YASKAWA TOEPC7106171FD FP605 DRIVE INSTALLATION & PRIMARY OPERATION
Causes
Main PID Feedback Transducer is broken.
The drive detected wire-break on the analog input
terminal set for PID Feedback Backup [H3-xx = 24].
Backup PID Feedback Transducer is broken.
Parameter Y4-41 = 1 [Diff Lvl Src Fdbk Backup
Select = Enabled] and the drive detected a wire-break
on the analog input terminal set for Differential Level
Source [H3-xx = 2D].
Parameter Y4-41 = 1 and the Differential PID
Feedback Transducer is broken.
The communications cable wiring is incorrect.
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.
The communications cable wiring is incorrect.
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.
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.
The drive received a fault reset command when a Run
command was active.
20 Troubleshooting
Possible Solutions
Replace Main PID Feedback Transducer.
Examine the connection of the Differential PID Feedback
transducer.
Replace Backup PID Feedback Transducer.
Examine the connection of the Differential PID Feedback
transducer.
• Replace the Differential PID Feedback Transducer.
• Set Y4-41 = 0 [Disabled].
Correct wiring errors.
Use MEMOBUS/Modbus communications to enter the enter
command, then use the keypad to change the parameter.
Wait until the process is complete.
Correct wiring errors.
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.
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 recommended shielded line. Ground the shield on the
controller side or on 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.
• Make sure that the settings are compatible.
• Change the software settings in the PLC.
• Increase the value set in H5-09.
Examine the controller and remove the cause of the problem.
Turn off the Run command then de-energize and re-energize the
drive.
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