Epson EM07ZS1647F - Manual (Page 104)

4. Troubleshooting (DeviceNet)
♦ Process Flowchart
7 Check
Finish
The unit is not found.
Immediately
The unit is found.
Yes
† No Change
No change
The problem is fixed.
† No Change
The problem is fixed.
Replace the master unit.
† No Problem
Problem exists. (Fix it.)
Measure voltage of
communications power supply.
Rarely
No change
Does an error occur immediately?
† No Change
No change
The problem is fixed.
Check for noise influence.
Replace the unit.
No
Normal Communication?
Check the following:
- Unconnected terminating resistor
- Unconnected or loose connector/signal wire
- Cable disconnection
† No Problem
Problem exists. (Fix it.)
† No Problem
Check for master unit
configuration (scan list configuration).
The problem is fixed.
† The trouble unit is not found.
No problem
No problem
No problem
Divide the network and
find the trouble unit.
„ Analyze the network with NetMeter.
„ Consult the DeviceNet manufacturer.
See 4.1.3.1 and 4.1.3.2.
See 4.1.3.3.
Replace moving cable
(Replace deteriorated cable).
92 Fieldbus I/O Rev.6