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CompoNet Network Start/Stop Conditions
• The CompoNet network will start when the power supply to the Gateway Unit and the communica-
tions power supply to the Slave Units are turned ON.
Note: Overall communications will not stop even if there is a verification error for the registration table or a dupli-
cated slave address.
• If data links cannot operate on the CC-Link network (i.e., if the Error Status Flag in CC-Link Status is
ON), remote I/O communications for the CompoNet network will also stop.
If data links start on the CC-Link network, remote I/O communications for the CompoNet network will
also start.
Communications Errors on the CompoNet Network
A communications error occurs when a Slave Unit cannot respond normally to a communications
request from the Gateway Unit. The main causes of communications errors are given below.
• Failure of the Slave Unit
• Disconnected communications cable to the Slave Unit
• Communications power interruption
• Noise or other factor that prevents normal data reception from the Slave Unit
If a communications error occurs for a Slave Unit, the NS indicator on the front of the Gateway Unit will
flash red and "d9" will be displayed on the seven-segment display. Also, the Communications Error Flag
(bit 00 in the Status Area) will turn ON.
CompoNet Gateway Unit for CC-Link Operation Manual
Remote I/O Communications
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Troubleshooting
