140
Maintenance
Section 8-2
Note
Never use volatile solvents, such as paint thinner or benzene, or chemical
wipes to clean the Unit. These substances may damage the surface of the
Unit.
8-2-2
Inspection
Inspect the system periodically to keep it in its optimal operating condition.
In general, inspect the system once every 6 to 12 months, but inspect more
frequently if the system is used in high-temperature, humid, or dusty condi-
tions.
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 by adjusting the Unit or improving the environmental conditions.
8-2-3
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 Network 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.
Note
Before replacing a Unit, always stop Network communications and turn OFF
the power to all the nodes in the Network.
Settings after
Replacing a Unit
After replacing a Unit, set the new Unit's switches to the same settings that
were on the old Unit. Connect the same model of DeviceNet Communications
Unit to the Temperature Controllers as the previous Unit.
Note
1.
By backing up the settings of the DeviceNet Communications Unit and the
Temperature Controllers, the settings can be reset in a batch. For details
Inspection item
Details
Standard
Equipment
Environmental conditions
Are ambient and cabinet temperatures
correct?
−
10 to +55
°
C
Thermometer
Are ambient and cabinet humidity cor-
rect?
25% to 85%
Hygrometer
Has dust or dirt accumulated?
No dust or dirt
Visual inspection
Installation conditions
Are the Units installed securely?
No looseness
Phillips screwdriver
Are the connectors of the communica-
tions 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
Summary of Contents for EJ1 - 07-2008
Page 3: ...iv...
Page 19: ...xx...
Page 33: ...14 Initial Temperature Controller Settings Section 1 4...
Page 53: ...34 Wiring the Temperature Controllers Section 3 4...
Page 101: ...82 Ladder Programming Examples Section 4 6...
Page 143: ...124 Sending Explicit Messages Section 6 5...
Page 155: ...136 Message Communications Characteristics Section 7 2...
Page 163: ...144 Maintenance Section 8 2...
Page 189: ...170 Allocation Numbers for Configurators Manufactured by Other Companies Appendix B...
Page 197: ...178 Index...