Epson RC620 Manual page 187

4.2.2.1 Master: Communication Error
Light
OFF
Master/Slave: Communication Error
RC620 Option Fieldbus I/O Rev.8
Master Unit LED
BF ST
Red Communication
Light error
Blinking
Master LED Condition
Absent Slave LED Condition
(Communication error)
4. Troubleshooting (PROFIBUS DP)
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
BF
Light OFF
Light OFF
Light OFF
Description
ST
Red Light Blinking
Green Light Blinking
Red Light Blinking
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