Epson RC90 Manual page 318

4. Troubleshooting (PROFIBUS DP)
4.2.2.4 Master: Configuration Error
Red Light
ON
♦ Process Flowchart
Check
 No Problem
 No Change
 The trouble unit is not found.
Rarely
306
Master Unit LED
BF ST
No Physical error
Matter
8
Check the following:
- Unconnected terminating resistor
- Unconnected or loose connector/signal wire
- Cable disconnection
No problem
Replace moving cable.
(Replace deteriorated cable).
No change
Does an error occur immediately?
Immediately
Divide the network and
find the trouble unit.
The unit is not found.
Consult the PROFIBUS manufacturer.
Error
- Nonstandard wiring
- Signal wire connection failure
- Signal wire short circuit
Problem exists. (Fix it.)
See 4.2.3.1 and 4.2.3.2.
The problem is fixed.
The unit is found.
Replace the unit.
Normal Communication?
RC700 / RC90 Option Fieldbus I/O Rev.14
Description
Yes
No
Finish