Epson RC90 - 4.2.3 Procedures for Examining Possible Causes

4. Troubleshooting (PROFIBUS DP)
RC700 / RC90 Option Fieldbus I/O Rev.14 295
4.2.2.1 Master: Communication Error
Master Unit LED
Error Description
BF
ST
Light
OFF
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)
- Nonstandard wiring
- No or too many terminating resistors
- Noise intrusion
Master/Slave: Communication Error
BF
ST
Master LED Condition
Light OFF
Red Light Blinking
Absent Slave LED Condition
(Communication error)
Light OFF
Green Light Blinking
Light OFF
Red Light Blinking