Yaskawa 1000 Series Drive Option - MECHATROLINK-II Installation - Manual (Page 26)

26 YASKAWA ELECTRIC TOBP C730600 50C YASKAWA 1000-Series Option SI-T3 Installation Manual
7 Troubleshooting
7 Troubleshooting
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Unit-Side Error Codes
Unit-side error codes appear on the unit’s operator. Causes of the errors and corrective
actions are listed in Table 6 .
For additional error codes that may appear on the operator screen, refer to the instruction
manual for the unit the MECHATROLINK-II Option is connected to.
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Faults
Both bUS (MECHATROLINK-II Option Communication Error) and EF0 (External Fault
Input from the MECHATROLINK-II Option) can appear as an alarm or as a fault. Unit
parameters can determine these responses between an alarm and 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 unit 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?
Table 6 Fault Display and Possible Solutions
Operator Display Fault Name
bUS
MECHATROLINK-II Option Communication Error
After establishing initial communication, the connection was lost.
Only detected when the run command or frequency reference is assigned to the option
(b1-03 = 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.
⇒ Use cables specified.
MECHATROLINK-II
Option is damaged.
⇒ If there are no problems with the wiring and the error continues to occur, replace the
MECHATROLINK-II Option.