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Operating Environment Precautions 4
!Caution Execute online edit only after confirming that no adverse effects will be
caused by extending the cycle time. Otherwise, the input signals may not be
readable.
4 Operating Environment Precautions
!Caution Do not operate the control system in the following places:
• Locations subject to direct sunlight.
• Locations subject to temperatures or humidity outside the range specified
in the specifications.
• Locations subject to condensation as the result of severe changes in tem-
perature.
• Locations subject to corrosive or flammable gases.
• Locations subject to dust (especially iron dust) or salts.
• Locations subject to exposure to water, oil, or chemicals.
• Locations subject to shock or vibration.
!Caution Take appropriate and sufficient countermeasures when installing systems in
the following locations:
• Locations subject to static electricity or other forms of noise.
• Locations subject to strong electromagnetic fields.
• Locations subject to possible exposure to radioactivity.
• Locations close to power supplies.
!Caution The operating environment of the PC System can have a large effect on the
longevity and reliability of the system. Improper operating environments can
lead to malfunction, failure, and other unforeseeable problems with the PC
System. Be sure that the operating environment is within the specified condi-
tions at installation and remains within the specified conditions during the life
of the system. Follow all installation instructions and precautions provided in
the operation manuals.
5 Application Precautions
Observe the following precautions when using the PC System.
!WARNING Always heed these precautions. Failure to abide by the following precautions
could lead to serious or possibly fatal injury.
• Always connect to a ground of 100 Ω or less when installing the Units. Not
connecting to a ground to a ground of 100
Ω or less may result in electric
shock.
• A ground of 100 Ω or less must be installed when shorting the GR and LG
terminals on the Power Supply Unit.
• Always turn OFF the power supply to the PC before attempting any of the
following. Not turning OFF the power supply may result in malfunction or
electric shock.