Sharp JW-21MN - Manual (Page 102)

16-7
(4) When the communication error occurs instantaneously.
Cause may be:
- Noise on the communication line.
- Fault of a communication module.
- Fault of a communication cable.
Check the error's timing.
When the error occurs synchronous with a peripheral industrial robot's operation, noise to the
communication line may be a cause. Consider arrangement of the wiring route.
Identify the error station.
When the error occurs at only the specific station, the cause may be the station or nearby. Check
the following items.
- Setting of the LT (termination resistance) switch.
- Cable (See page 16-6 "Check items of cables and connectors")
- Error code (See page 12-1)
When identification of the cause is difficult.
Condition of the circuit may be unstable. (See page 16 -6 "Check items of cables and connectors")
(5) When the communication error occurs continuously.
Identify the error station.
Specify the error's station using the communication flag etc., and check this station.
- Check the power of the error's station.
- Check the error code of the error's station.
- Check cables near the error's station. (See page 16-6 "Check items of cables and connectors")
When identification of the cause is difficult.
Condition of the whole circuit may be unstable. Check cables and connectors.
(See page 16 -6 "Check items of cables and connectors")