Sumitomo HF-520 - Single Drive Fault Diagnosis; Single Drive LED Fault Display Table

9 Troubleshooting
25
■ 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 17
Figure 17 Connecting a Single Drive
Table 16 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