Problems And Countermeasures - Epson RC620 Manual

4.2.2 Problems and Countermeasures

Light
OFF
Light
OFF
Light
OFF
Light
OFF
Light
OFF
Red
Light ON
RC620 Option Fieldbus I/O Rev.8
Master Unit LED
BF ST
Green Normal
Light communication
Blinking
Green Ready for
Light ON communication
Red Communication
Light error
Blinking
Red Data link layer
Light ON error
Light Uninitialized
OFF network
No Physical error
Matter
4. Troubleshooting (PROFIBUS DP)
Error Description [Reference]
- Normal condition
- Normal condition
[Refer to the section 4.2.2.1 Master
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
[Refer to the section 4.2.2.2 Master: Data
Link Layer Error.]
- Nonstandard wiring
- Noise intrusion
[Refer to the section 4.2.2.3 Master:
Uninitialized Network.]
- Master unit power error
- Master unit configuration error
[Refer to the section 4.2.2.4 Master:
Configuration Error.]
- Nonstandard wiring
- Signal wire connection failure
- Signal wire short circuit
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