7 troubleshooting, Drive-side error codes, 7troubleshooting – Yaskawa V1000 Option DeviceNet User Manual
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YASKAWA ELECTRIC TOBP C730600 28B V1000 Option DeviceNet Installation Manual
7 Troubleshooting
7
Troubleshooting
◆
Drive-Side Error Codes
Drive-side error codes appear on the drive’s LED operator. Causes of the errors and
corrective actions are listed in
.
For additional error codes that may appear on the LED operator screen, refer to the drive
technical manual.
■
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?
Table 10 Fault Display and Possible Solutions
LED Operator Display
Fault Name
bUS
DeviceNet Option Communication Error.
After establishing initial communication, the connection was lost.
Only detected when the run command frequency reference is assigned to the
option (b1-01=3 or b1-02=3).
Cause
Possible Solution
Master controller (PLC) has stopped
communicating.
Check for faulty wiring.
• Correct any wiring problems.
Communication cable is not connected
properly.
A data error occurred due to noise.
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.
DeviceNet Option is damaged.
If there are no problems with the wiring and errors continue to occur, replace
the DeviceNet Option.