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Maintenance Section 9-3
Inspection Equipment Prepare the following equipment before inspecting the system.
Equipment Required for
Regular Inspection
A flat-blade and a Phillips screwdriver, a screwdriver for connecting communi-
cations connectors, a tester (or a digital voltmeter), industrial alcohol, and a
clean cloth are required for routine inspection.
Other Equipment that May
Be Required
A synchroscope, oscilloscope, thermometer, or hygrometer may be required.
Inspection Procedure Check the items in the following table and correct any condition that is below
standard.
9-3-3 Replacing Units
The Network consists of the DeviceNet Master Unit and Slave Units. The
entire network is affected when a Unit is faulty, so a faulty Unit must be
repaired or replaced quickly. We recommend having spare Units available to
restore Net-work operation as quickly as possible.
Precautions Observe the following precautions when replacing a faulty Unit.
After replacement make sure that there are no errors with the new Unit.
When a Unit is being returned for repair, attach a sheet of paper detailing the
problem and return the Unit to your OMRON dealer.
If there is a faulty contact, try wiping the contact with a clean, lint-free cloth
dampened with alcohol.
Settings after
Replacing Units
After replacing a Unit, set the new Unit's switches to the same settings that
were on the old Unit.
Inspection item Details Standard Equipment
Environmental condi-
tions
Are ambient and cabinet tem-
peratures correct?
Refer to the specifications for
each Slave.
Thermometer
Are ambient and cabinet
humidity correct?
Refer to the specifications for
each Slave.
Hygrometer
Has dust or dirt accumulated? No dust or dirt Visual inspection
Installation condi-
tions
Are the Units installed
securely?
No looseness Phillips screwdriver
Are the connectors of the
communications cables fully
inserted?
No looseness Phillips screwdriver
Are the external wiring screws
tight?
No looseness Phillips screwdriver
Are the connecting cables
undamaged?
No external damage Visual inspection
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