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8 Troubleshooting
8
Troubleshooting
◆
Drive-Side Error Codes
Drive-side error codes appear on the drive LED operator. Causes of the errors and corrective
actions are listed in
. For additional error codes that may appear on the LED
operator screen, refer to the technical manual for the drive.
■
Faults
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?
Table 11 Fault Display and Possible Solutions
LED Operator Display
Fault Name
bUS
PROFIBUS-DP 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
Ground the shield on the controller side and on the PROFIBUS-DP Option
side
PROFIBUS-DP Option is damaged.
If there are no problems with the wiring and the error continues to occur,
replace the PROFIBUS-DP Option
Содержание DeviceNet HF-520 Series
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