YASKAWA CC-Link Technical Manual page 41


Faults that Occur with a Single Drive
The example below demonstrates how to read the LED display on the front cover of the drive to determine the cause of a
fault and corrective action.
Figure 28
L.RUN SD RD L.ERR
×
  
   
×
  
× ×
 
×
  
× ×
 
× ×
 
 × × ×
×   
× ×
 
× ×
 
× × ×

× ×
 
× ×  ×
× × × 
× × × ×
× × ∗

   
Note: SD and RD may appear to flash with slower baud rates.
YASKAWA ELECTRIC SIEP C730600 83D YASKAWA AC Drive Option SI-C3 Technical Manual
Power
CPU
supply
Figure 28 Connecting a Single Drive
Table 26 LED Fault Display for CC-Link Option with a Single Drive
Cause
Normal communications
Error has occurred but communication is
normal.
Problem with the hardware
Problem with the hardware
CRC error with the data received, and no
response can be sent
No station address received
Problem with the hardware
Problem with the hardware
A response was received after polling, but a
CRC error occurred when the reflex data was
checked.
Problem with the hardware
Problem with the hardware
Problem with the hardware
CRC errors occurs when the station address is
checked.
• No station address
• Cannot receive station address due to
electrical noise interference
Problem with the hardware
Data cannot be received (CC-Link
communications cable may be disconnected)
The station address or communications speed
is set incorrectly.
The station address or communications speed
was changed without cycling power
afterwards.
Station 1
Drive
Master
device
CC-Link
Option
: On / : Flashing / ×: Off / ∗: Either on or off
Remove the source of electrical noise interference.
Try cycling the power.
Replace the CC-Link Option if the problem continues.
Try cycling the power.
Replace the CC-Link Option if the problem continues.
Remove the source of electrical noise interference.
Check the PLC program and the operation where the problem
occurred.
Try cycling the power.
Replace the CC-Link Option if the problem continues.
Try cycling the power.
Replace the CC-Link Option if the problem continues.
Remove the source of electrical noise interference.
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.
Try cycling the power.
Replace the CC-Link Option if the problem continues.
Try cycling the power.
Replace the CC-Link Option if the problem continues.
Remove the source of electrical noise interference.
Remove the source of electrical noise interference.
Try cycling the power.
Replace the CC-Link Option if the problem continues.
Check the wiring.
Enter the proper settings and cycle power.
Return any incorrect settings to their original values and cycle
power.
Enter the proper settings and cycle power.
9 Troubleshooting
Possible Solution
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41