Epson RC90 User Manual

4. Troubleshooting (DeviceNet)
RC700 / RC90 Option Fieldbus I/O Rev.14 269
4.1.2.3 Master: Unestablished Communication
Master Unit LED
Error Description
MS
NS
Green
Light ON
Light
OFF
Master
Unestablished
communication
Communications power supply OFF
No slave
♦ Process Flowchart
6
 No Problem
Check
Check the following:
- Unconnected terminating resistor
- Unconnected or loose connector/signal wire
- Cable disconnection
Finish
Measure voltage of
communications power supply
at the master unit.
 No Problem
 No Problem
 No Problem
Problem exists. (Fix it.)
Problem exists. (Fix it.)
Check that power is supplied to all slaves.
Replace the master unit.
Problem exists. (Fix it.)
Problem exists. (Fix it.)
No problem
No problem
No problem
No problem
Check for master unit configuration.
See 4.1.3.1 and 4.1.3.2.

Epson RC90 Specifications

General

Brand	Epson
Model	RC90
Category	Controller
Language	English