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Maintenance Inspections
Section 8-5
8-5
Maintenance Inspections
In order for your SYSMAC system to operate in optimum condition, be sure to
carry out daily or periodical inspections.
Inspection Items
The main system components of a SYSMAC system are semiconductors, and
it contains few components with limited lifetimes. Poor environmental condi-
tions, however, can lead to deterioration of the electrical components, making
regular maintenance necessary.
The standard period for maintenance checks is 6 months to 1 year, but more
frequent checks are required if the PLC is operated in more demanding condi-
tions.
If the criteria are not met, adjust to within the specified ranges.
Required Tools
Standard Tools (Required)
• Screwdrivers (Phillips and flat-blade)
• Voltage tester or digital voltage meter
• Industrial alcohol and a cotton cloth
Measurement Devices (May be Needed)
• Synchroscope
• Cathode-ray oscilloscope
• Thermometer, hygrometer
Note Do not attempt to disassemble, repair, or modify the PLC in any way.
Inspection items
Details
Criteria
Remarks
Power supply
Determine whether the voltage fluctu-
ation at the power supply terminals is
within specifications.
Within the voltage variation range:
24-V DC model: 20.4 to 26.4 V DC
12-V DC model: 10.8 to 14.4 V DC
Tester
Environmental con-
ditions
Is the ambient temperature inside the
panel appropriate?
0 to 55
°
C
Thermometer
Is the ambient humidity inside the
panel appropriate?
35% to 85% RH with no condensa-
tion
Hygrometer
Has dirt or dust collected?
None
Visual inspection
I/O power supply
Is the voltage fluctuation measured at
the I/O terminals within the standard
range?
Each I/O terminal must conform to
the specifications
Tester
Installation status
Are all Boards securely installed?
Nothing is loose
Phillips screw-
driver
Are all connection cables and connec-
tors inserted completely and locked?
Nothing is loose
Visual inspection
Are any of the external wiring screws
loose?
Nothing is loose
Phillips screw-
driver
Are any of the external wiring cables
frayed?
No external abnormalities
Visual inspection
Product service life
Contact output relay
Electrical:
Resistance load:
300,000 operations
Inductive load:
100,000 operations
Mechanical:
10,000,000 operations
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Battery (C500-BAT08)
5 years
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