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9 Troubleshooting
YASKAWA ELECTRIC SIEP C730600 22C V1000 Option CC-Link Technical Manual 27
 Faults that Occur with a Single Drive
The example below demonstrates how to read the LED display on the CC-Link Option to determine the cause of a fault and corrective action.
Figure 20
Figure 20 Connecting a Single Drive
Table 18 LED Fault Display for CC-Link Option with a Single Drive
Note: SD and RD may appear to flash with slower baud rates.
 : On /  : Flashing / × : Off / ∗ : Either on or off
L.RUN SD RD L.ERR Cause Possible Solution
   × Normal communications –
    Error has occurred but communication is normal

Remove the source of noise interference.
 
×
 Problem with the hardware

Try cycling the power.
Replace the CC-Link Option if the problem continues.
  × × Problem with the hardware

Try cycling the power.
Replace the CC-Link Option if the problem continues.

×
 
CRC error with the data received, and no response can be
sent

Remove the source of noise interference.

×

×
No station address received

Check the PLC program and the operation where the problem occurred.

× ×
 Problem with the hardware

Try cycling the power.
Replace the CC-Link Option if the problem continues.
 × × × Problem with the hardware

Try cycling the power.
Replace the CC-Link Option if the problem continues.
×
  
A response was received after polling, but a CRC error
occurred when the reflex data was checked

Remove the source of noise interference.
×   × Problem with the hardware

Try cycling the power.
Replace the CC-Link Option if the problem continues.

See if the master device is actually set to function as a remote device station.
×

×
 Problem with the hardware

Try cycling the power.
Replace the CC-Link Option if the problem continues.
×  × × Problem with the hardware

Try cycling the power.
Replace the CC-Link Option if the problem continues.
× ×   CRC errors occurs when the station address is checked.

Remove the source of noise interference.
× ×  ×
• No station address
• Cannot receive station address due to noise interference

Remove the source of noise interference.
× × ×
 Problem with the hardware

Try cycling the power.
Replace the CC-Link Option if the problem continues.
× × × ×
Data cannot be received (CC-Link communications cable
may be disconnected)

Check the wiring.
× × ∗

The station address or communications speed is set
incorrectly

Enter the proper settings and cycle power.
   
The station address or communications speed was changed
without cycling power afterwards.

Return any incorrect settings to their original values and cycle power.

Enter the proper settings and cycle power.
Power
supply
CPU
Master
device
Station 1
DRIVE
CC-Link
Option
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