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8·59
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.
• Check cables/connectors
Looseness or removal of connectors (turn right until fixed securely)
Whether connectors are assembled to cables appropriate (check insulation/conductivity)
Cable length should be less than 1 km
Branch cable length should be less than 40 cm
• Error code (See page 8·52)
When identification of the cause is difficult.
Condition of the circuit may be unstable. (See page 8·52 “check items of cables and connectors”)
· Looseness or removal of connectors (turn right until fixed securely)
·Whether connectors are assembled to cables appropriate (check insulation/conductivity)
· Cable length should be less than 1 km
· Branch cable length should be less than 40 cm