Troubleshooting - YASKAWA SI-P3/V Installation Manual

8

Troubleshooting

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Drive-Side Error Codes
Drive-side error codes appear on the drive LED operator. Causes of the errors and corrective
actions are listed in
operator screen, refer to the technical manual for the drive.
Faults
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bUS (PROFIBUS-DP Option Communication Error) and EF0 (External Fault Input from the
PROFIBUS-DP Option) may appear as an alarm or a fault. When a fault occurs, the digital
operator LEDs remain lit. When an alarm occurs, the digital operator LEDs flash and the
"ALM" light illuminates
If communication stops while the drive is running, check the following items to resolve the
fault:
• Is the PROFIBUS-DP Option properly installed?
• Is the communication line properly connected to the PROFIBUS-DP Option? Is it loose?
• Is the controller program working? Has the controller 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
PROFIBUS-DP Option is damaged.
YASKAWA ELECTRIC TOBP C730600 23C 1000-Series Option SI-P3/V, SI-P3/T Installation Manual
Table 12. For additional error codes that may appear on the LED
Table 12 Fault Display and Possible Solutions
PROFIBUS-DP 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 recommended by Yaskawa, or another type of shielded line.
Ground the shield on the controller side and on the PROFIBUS-DP Option
side
If there are no problems with the wiring and the error continues to occur,
replace the PROFIBUS-DP Option
8 Troubleshooting
Fault Name
Possible Solution
33