Epson RC620 Manual page 164

4. Troubleshooting (DeviceNet)
♦ Process Flowchart
Check
 No Problem
 No Problem
 No Problem
 No Change
 No Change
 No Change
 The trouble unit is not found.
Rarely
154
7
Check for master unit
configuration (scan list configuration).
No problem
Check the following:
- Unconnected terminating resistor
- Unconnected or loose connector/signal wire
- Cable disconnection
No problem
Measure voltage of
communications power supply.
No problem
Replace moving cable
(Replace deteriorated cable).
No change
Check for noise influence.
No change
Replace the master unit.
No change
Does an error occur immediately?
Immediately
Divide the network and
find the trouble unit.
The unit is not found.
 Analyze the network with NetMeter.
 Consult the DeviceNet manufacturer.
The problem is fixed.
Problem exists. (Fix it.)
See 4.1.3.1 and 4.1.3.2.
Problem exists. (Fix it.)
The problem is fixed.
The problem is fixed.
See 4.1.3.3.
The problem is fixed.
The unit is found.
Replace the unit.
Normal Communication?
No
RC620 Option Fieldbus I/O Rev.8
Yes
Finish