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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 addtional error codes that may appear on the LED operator screen, refer to the V1000
Technical Manual.
Faults
■
Both bUS (MECHATROLINK-II Option Communication Error), EF0 (External Fault Input
from the MECHATROLINK-II Option) and E5 (SI-T Watchdog Timer Error) 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 MECHATROLINK-II Option properly installed?
• Is the communication line properly connected to the MECHATROLINK-II Option? Is it
loose?
• Is the PLC program working? Has the PLC CPU stopped?
• Did a momentary power loss interrupt communications?
LED Operator Display
Cause
Master controller (PLC) has stopped
communicating.
Communication cable is not connected
properly.
A data error occurred due to noise
MECHATROLINK-II Option is
damaged.
24
Table
6.
Table 6 Fault Display and Possible Solutions
MECHATROLINK-II Option Communication Error
After establishing initial communication, the connection was lost.
bUS
Only detected when the run command or frequency reference is assigned to
the option (b1-01 = 3 or b1-02 = 3).
Check for any faulty wiring.
⇒ Correct any wiring problems.
⇒ Take care of any grounding problems or disconnects wires.
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 the magnetic contactor is identified as a source of noise, install a surge
absorber to the contactor coil.
⇒ Use cables recommended by Yaskawa, or another type of shielded line.
The shield should be grounded on the PLC side and on the option unit side.
⇒ If there are no problems with the wiring and the error continues to occur,
replace the MECHATROLINK-II Option.
YASKAWA ELECTRIC TOBP C730600 49A V1000 Option MECHATROLINK-II Installation Manual
Fault Name
Possible Solution
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