YASKAWA MECHATROLINK-II SI-T3 Technical Manual page 36

9 Troubleshooting
Drive-Side Error Codes
Drive-side error codes appear on the drive's operator. Causes of the errors and corrective actions are listed in
For additional error codes that may appear on the operator screen, refer to the technical manual for the drive the
MECHATROLINK-II Option is connected to.
Faults
Both bUS (MECHATROLINK-II Option Communication Error), EF0 (External Fault Input from the
MECHATROLINK-II Option) and E5 (SI-T3 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?
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.
Operator Display
Cause
Data has not been received from the PLC,
triggering the watchdog timer.
Operator Display
Cause
An external fault is being sent from the master
controller (PLC).
Problem with the PLC program
Operator Display
Cause
Non-compatible option connected to the drive
Operator Display
Cause
Problem with the connectors between the drive
and MECHATROLINK-II Option
36
Table 28 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 (b1-03 =
3 or b1-02 = 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.
⇒ Use cables specified.
⇒ If there are no problems with the wiring and the error continues to occur, replace the
MECHATROLINK-II Option.
SI-T3 Watchdog Timer Error
E5
The watchdog has timed out.
⇒ Execute DISCONNECT or ALM_CLR, then issue a CONNECT command or SYNC_SET
command and proceed to phase 3.
External Fault Input from MECHATROLINK-II 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.
MECHATROLINK-II Option Fault (CN5-A)
oFA00
MECHATROLINK-II Option is not properly connected.
⇒ Connect an option that is compatible with the drive.
MECHATROLINK-II Option Fault (CN5-A)
oFA01
MECHATROLINK-II Option is not properly connected.
⇒ Turn the power off and check the connectors between the drive and MECHATROLINK-II
Option.
YASKAWA ELECTRIC SIEP C730600 50A YASKAWA AC Drive-Option Card MECHATROLINK-II Technical Manual
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Table 28.