4. Troubleshooting (PROFIBUS DP)

Process Flowchart

Check

1

2

 

 

 

Check the following:

Problem exists. (Fix it.)

 

† No Problem

 

- Unconnected terminating resistor

 

 

- Unconnected or loose connector/signal wire

 

 

 

 

- Cable disconnection

See 4.2.3.1 and 4.2.3.2.

 

 

No problem

 

 

† No Problem

 

Measure voltage of all

Problem exists. (Fix it.)

 

 

 

 

 

slave power supplies.

 

 

 

 

 

 

 

 

No problem

 

 

† No Change

 

Replace the trouble unit.

The problem is fixed.

 

 

 

 

 

 

No change

 

 

† No Change

 

Replace moving cable.

The problem is fixed.

 

 

 

 

 

(Replace deteriorated cable).

 

 

 

 

No change

 

 

† No Change

 

Check for noise influence.

The problem is fixed.

 

 

See 4.2.3.3.

 

 

 

 

 

No change

 

 

† The trouble unit is not found.

 

 

 

Rarely

Does an error occur immediately?

 

 

 

 

 

 

 

 

Immediately

 

 

 

 

Divide the network and

The unit is found.

 

 

 

 

 

 

 

find the trouble unit.

 

 

 

 

The unit is not found.

Replace the unit.

 

 

 

 

 

 

 

 

Normal Communication?

Yes

 

 

 

 

 

 

 

No

 

 

 

Consult the PROFIBUS manufacturer.

 

Finish

Fieldbus I/O Rev.6

117

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Epson EM07ZS1647F manual 117