Troubleshooting - YASKAWA DeviceNet SI-N3 Technical Manual

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Troubleshooting

Drive-Side Error Codes
Drive-side error codes appear on the drive digital operator. Causes of the errors and corrective actions are listed in
Table 21.
For additional error codes that may appear on the digital operator screen, refer to the technical manual for the drive.
Faults
Both bUS (DeviceNet Option Communication Error) and EF0 (External Fault Input from the DeviceNet Option) can
appear as an alarm or as a fault. When a fault occurs, the digital operator ALM LED remains. When an alarm occurs, the
digital operator ALM LED flashes.
If communication stops while the drive is running, answer the following questions to help remedy the fault:
• Is the DeviceNet Option properly installed?
• Is the communication line properly connected to the DeviceNet Option? Is it loose?
• Is the controller program working? Has the controller CPU stopped?
• Did a momentary power loss interrupt communications?
Digital Operator Display
Cause
Master controller (PLC) has stopped
communicating.
Communication cable is not connected properly.
A data error occurred due to noise.
DeviceNet Option is damaged.
Network power loss
Connection timeout
Duplicate MAC ID
Digital Operator Display
Cause
An external fault is being sent from the upper
controller (PLC).
Problem with the PLC program.
Digital Operator Display
Cause
Non-compatible option connected to the drive.
YASKAWA ELECTRIC SIEP C730600 43A YASKAWA AC Drive-Option Card DeviceNet Technical Manual
Table 21 Fault Display and Possible Solutions
DeviceNet Option Communication Error
After establishing initial communication, the connection was lost.
bUS
Only detected when the run command frequency reference is assigned to the option (bl-01 = 3
or bl-02 = 3).
Check for faulty wiring.
Correct any wiring problems.
Check the various options available to minimize the effects of noise.
Take steps to counteract noise in the control circuit wiring, main circuit lines, and ground
wiring.
If a magnetic contactor is identified as a source of noise, install a surge absorber to the contactor
coil.
Make sure the cable used fulfills the DeviceNet requirements. Ground the shield on the
controller side and on the DeviceNet Option side.
If there are no problems with the wiring and the error continues to occur, replace the DeviceNet
Option.
The power on the DeviceNet network cable is 0.
Verify power is available between option terminals V+ (red) and V- (black).
The DeviceNet option Expected Packet Rate (EPR) timer timed out.
Make sure that EPR time is set properly.
The DeviceNet option MAC ID and at least one other mode have the same MAC ID.
Verify F6-50 is set properly.
External Fault Input from DeviceNet Option
EF0
The alarm function for an external device has been triggered.
Remove the cause of the external fault.
Reset the external fault input from the PLC device.
Check the program used by the PLC and make the appropriate corrections.
DeviceNet Option Fault (CN5-A)
oFA00
DeviceNet Option is not properly connected.
Connect an option that is compatible with the drive.
Fault Name
Possible Solution
Fault Name
Corrective Action
Fault Name
Possible Solution
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