Epson RC620 Manual page 188

4. Troubleshooting (PROFIBUS DP)
♦ Process Flowchart
Check
 No Problem
 No Problem
 No Change
 No Change
 No Change
 The trouble unit is not found.
Rarely
178
1
Check the following:
- Unconnected terminating resistor
- Unconnected or loose connector/signal wire
- Cable disconnection
No problem
Measure voltage of all
slave power supplies.
No problem
Replace the trouble unit.
No change
Replace moving cable.
(Replace deteriorated cable).
No change
Check for noise influence.
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.
2
Problem exists. (Fix it.)
Problem exists. (Fix it.)
The problem is fixed.
The problem is fixed.
The problem is fixed.
The unit is found.
Replace the unit.
Normal Communication?
RC620 Option Fieldbus I/O Rev.8
See 4.2.3.1 and 4.2.3.2.
See 4.2.3.3.
Yes
No
Finish