Routine Inspections - Omron C200H-MC221 Operation Manual

Routine Inspections

Routine Inspections
Inspection Points
Item
Power Supply Measure the voltage variations at the
power supply terminal block.
I/O Power Measure the voltage variations at the
Supply I/O power supply terminal block.
Ambient
Ambient (in-panel) temperature
conditions di i
Ambient (in-panel) humidity
Dust/Dirt accumulation
System y Each Unit's installation
condition di i
Cable connections
Wiring terminal screws
Damage to external wiring and cables
Ground Check each Unit/machine's ground.
Insulation Check that each terminal is insulated.
Required Tools
Precautions
224
In order for your MC Unit to continue operating at optimum condition, periodic
inspections are necessary. The main components of the Unit are semiconduc-
tors and have a long service life, but depending on the operating environment,
there may be more or less deterioration of these and other parts. A standard
inspection schedule is once every six months to one year. More frequent inspec-
tions may be advisable depending on the operating environment. Try to maintain
the inspection schedule once it has been set.
Check to be sure that the power supply, ambient temperature, humidity, etc. are
within the specifications. Be sure that these are no loose screws and that all bat-
tery and cable connections are secure. Clean any dust or dirt that has accumu-
lated.
Inspection points
The following tools are recommended when performing an inspection.
Standard and Phillips-head screwdrivers
Voltmeter
Alcohol and a clean towel
Synchroscope
Oscilloscope
Humidity gauge
Thermometer
Be sure to turn OFF the power when performing an inspection or replacing a
Unit. After replacing a Unit make sure the new Unit is operating properly.
If a contact isn't functioning properly, try cleaning the contact with a clean cloth
an alcohol. Remove any lint from the towel before re-installing the Unit.
Before resuming operations after MC Unit replacement, be sure to transfer the
programs, position data, and system parameters that are required for starting
operations again and carry out flash write procedures.
Specification
100 to 120 VAC
(Permissible voltage variation: 85 to 132 VAC max.)
200 to 240 VAC
(Permissible voltage variation: 170 to 264 VAC max.)
24 VDC
(Permissible voltage variation: 20.4 to 26.4 VDC max.)
Within I/O specifications.
0_C to 55_C
10% to 90% RH (no condensation)
None
No looseness
None
The ground should be connected.
No shorts or damage insulation
Section 11