Epson RC90 User Manual

4. Troubleshooting (DeviceNet)
276 RC700 / RC90 Option Fieldbus I/O Rev.14
4.1.2.6 Uninitialized Network
Master Unit LED
Error Description
MS
NS
Light OFF Light OFF Uninitialized network
Absent slave
- Master unit start-up error
- No slave (Error detection before
communication establishment)
- Communications power supply OFF
♦ Process Flowchart
9
 No Problem
Check
Check the following:
- Unconnected terminating resistor
- Unconnected or loose connector/signal wire
- Cable disconnection
Finish
 No Problem
 No Problem
 No Problem
Problem exists. (Fix it.)
Problem exists. (Fix it.)
Problem exists. (Fix it.)
Problem exists. (Fix it.)
No problem
No problem
No problem
No problem
Measure voltage of
communications power supply
at the master unit.
Check that power is supplied to all slaves.
Check for master unit configuration.
Replace the master unit.
See 4.1.3.1 and 4.1.3.2.

Epson RC90 Specifications

General

Brand	Epson
Model	RC90
Category	Controller
Language	English