4. Troubleshooting (PROFIBUS DP)
♦
Process Flowchart
Normal
See 4.2.3.2.
Turn OFF all units.
Normal
Resistance: over 120
Ω
Measure
resistance at
connectors
with tester.
Resistance: under 100
Ω
Problem exists.
(Add terminating resistors.)
Out of 100 to 120
Ω
(Error)
Yes
Other
Approx.
220
Ω
10 to 100
Ω
Under 10
Ω
No
(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
of terminating resistors.
Check that
terminating resistors
are connected.
Measure resistance
with tester.
100 to 120
Ω
Remove one terminating
resistor on either side.
Check for short
circuit between
signal wires.
Fieldbus I/O Rev.6
131
Summary of Contents for EM07ZS1647F
Page 1: ...Rev 6 EM07ZS1647F EPSON RC Option Fieldbus I O ...
Page 2: ...E PSON RC Option Fieldbus I O Rev 6 ...
Page 8: ...vi Fieldbus I O Rev 6 ...
Page 12: ...Table of Contents x Fieldbus I O Rev 6 ...
Page 80: ...2 Installation 68 Fieldbus I O Rev 6 ...
Page 88: ...3 Operation 76 Fieldbus I O Rev 6 ...
Page 164: ...5 Maintenance Parts List 152 Fieldbus I O Rev 6 ...
Page 168: ...Appendix A applicomIO Upgrade 156 Fieldbus I O Rev 6 ...