Epson RC90 - 4.1.3 Procedures for Examining Possible Causes

4. Troubleshooting (DeviceNet)
266 RC700 / RC90 Option Fieldbus I/O Rev.14
4.1.2.2 Master: Busoff Detection
Master Unit LED
Error Description
MS
NS
Green
Light ON
Red Light
ON
Busoff detection Communication stopped due to critical
error.
Duplicate MAC ID The MAC ID configuration was
duplicated. (This error occurs only
during unit start-up)