IDEC SX5L Series - Manual (Page 56)

5: T ROUBLESHOOTING
SX5L C OMMUNICATION T ERMINAL U SER ’ S M ANUAL 5-3
Troubleshooting Diagram 3
Note: If the ERR LED goes on repeatedly, see “Communication seems incomplete” on page 5-8.
The ERR LED is on.
If a reply message is not returned from the
addressee device, the ERR LED goes on, and
remains on until communication is established.
Check the node status of the addressee device.
YES
NO
NO
Is the addressee device
operating normally?
NO
Inser t the network inter face connector to the
bottom. NO
YES
Is the network
inter face connector inser ted
completely?
YES
Is the network cable
connected correctly?
YES
Is the transmission
distance within the limit?
Replace the SX5L or call IDEC for assistance.
Attach ferrules to the L ON W ORKS cable ends, and
connect the cable to the connector correctly.
Keep the transmission distance within the limit.
See page 2-3.
YES
Is a terminator
installed correctly?
NO
Without a terminator, stable communication may
not be ensured. Install one or two terminators
correctly. See pages 1-6 and 3-3.
NO
Is there influence
of external noise?
YES Keep away from external noise and confirm
operation again.