4. Troubleshooting (DeviceNet)
4.1.2.1 Master: Communication Error
Master Unit LED
MS NS Error Description
Green
Light ON
Red Light
Blinking
Communication
error
- Slave disconnected from the network
(Remote I/O communication error)
- Slave not added to the network
(Scan list collation error)
- Communications power supply OFF
(Error detection after the communication
establishment)
4.1.2.1.1 Slave: Not Operating
MS NS
Master LED Condition Green Light ON Red Light Blinking
Absent Slave LED Condition Light OFF Light OFF
♦ Process Flowchart
1
Check
Replace the unit.
No Problem
Yes
No Supply power.
Finish
Normal communication?
Is MS LED light ON?
Is power supplied to slaves?
See other errors.
No
Yes
Yes
No
82 Fieldbus I/O Rev.6