Epson EM07ZS1647F Especificações descarregar pdf (Página 111)

4. Troubleshooting (DeviceNet)

♦ Process Flowchart

Check that

terminating resistors

are connected.

Measure resistance

with tester.

50 to 70 Ω

Normal

See 4.1.3.2.

Turn OFF communications power supply.

Normal

Resistance: over 70

Ω

Remove one terminating

resistor on either side.

Measure

resistance at

connectors and

branch taps with

tester.

Resistance: under 50 Ω

Problem exists.

(Add terminating resistors.)

Out of 50 to 70 Ω (Error)

Yes

Other

pprox.

120

Ω

10 to 50 Ω

Under 10 Ω

(1) Unconnected or loose connector

(2) Cable disconnection, etc.

(1) Three or more

terminating resistors

(2) Wrong terminating

resistors, etc.

Short circuit

between signal

wires

Check for cable laying.

Find the trouble point.

Check for connection

with terminating resistors

and branch taps.

Check for shor

circuit between

signal wires.

Fieldbus I/O Rev.6 99

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