Epson RC90

4. Troubleshooting (DeviceNet)
262 RC700 / RC90 Option Fieldbus I/O Rev.14
4.1.2.1 Master: Communication Error
Master Unit LED
Error Description
MS
NS
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)
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