YASKAWA CC-Link SI-C3, Руководство по установке

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9 Troubleshooting
YASKAWA TOEP C730600 83A CC-Link Installation Manual 55
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Faults
Both bUS [Option Communication Error] and EF0 [Option Card External Fault] can
appear as a fault. When a fault occurs, the keypad ALM LED stays lit. The ALM LED
also illuminates. When an alarm occurs, the ALM LED flashes.
If communication stops while the drive is running, answer these questions to help fix the
problem:
• Is the communication line properly connected to the option? Is it loose?
• Is the CC-Link communication cable properly connected to the option?
• Is the PLC program working? Is the controller/PLC CPU stopped?
• Did a momentary power loss interrupt communications?
Code Name Causes Possible Solutions
bUS Option
Communication Error The drive did not receive a
signal from the controller.
The communications cable
wiring is incorrect.
•
Check for wiring errors.
•
Correct the wiring.
An existing short circuit or
communications disconnection Check disconnected cables and short
circuits and repair as needed
A data error occurred due to
electric interference • Prevent noise in the control circuit,
main circuit, and ground wiring.
•
If you identify a magnetic contactor
as a source of noise, install a surge
absorber to the contactor coil.
•
Use only recommended cables or
other shielded line. Ground the shield
on the controller side or the drive
input power side.
• Separate all communication wiring
from drive power lines. Install an
EMC noise filter to the drive power
supply input.
•
Decrease the effects of electrical
interference from the controller.
Option is damaged If there are no problems with the wiring
and the error continues to occur, replace
the option.
Connection Time-out Check if the CPU of the controller is not
stopped.
Duplicate IP Address found on
network Change to a different IP address. If F7-
13 = 0 [Address Mode at Startup =
Static]
, change parameters F7-01 to F7-
04 [IP Address 1 to 4] .