Yaskawa SI-EP3 PROFINET Installation - Manual (Page 43)

YASKAWA TOEP YEACOM 07A 1000-Series Option PROFINET SI-EP3 Installation Manual 43
8 Troubleshooting
8 Troubleshooting
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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 10 . For additional error codes that may appear on the
drive digital operator, refer to the drive Technical Manual.
■ Faults
Both bUS (SI-EP3 option communication error) and EF0 (External fault input from the
SI-EP3 option) can appear as an alarm or as a fault. When a fault occurs, the digital operator
ALM LED remains lit. When an alarm occurs, the ALM LED flashes.
If communication stops while the drive is running, use the following questions as a guide to
help remedy the fault:
• Is the option properly installed?
• Is the communication line properly connected to the option? Is it loose?
• Is the controller program working? Has the controller/PLC CPU stopped?
• Did a momentary power loss interrupt communications?
Table 10 Fault Display and Possible Solutions
LED Operator Display Fault Name
bUS
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
(b1-01 = 3 or b1-02 = 3)
Cause Possible Solution
Master controller (PLC) has stopped
communicating Check that power is supplied to the PLC
Check that PLC is not in program mode
Communication cable is not connected
properly Check for faulty wiring
Correct any wiring problems
A data error occurred due to noise
Check the various options available to minimize the effects of noise
Counteract noise in the control circuit, main circuit, 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 meets the PROFINET requirements
Make sure the option ground wire is connected between option FE terminal
and the drive ground terminal connected to earth ground
Option is damaged
If there are no problems with the wiring and the error continues to occur,
replace the option.