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xiv
Application Precautions
5
• 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 PLC 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 PLC
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.
5
Application Precautions
Observe the following precautions when using the PLC System.
!WARNING
Always heed these precautions. Failure to abide by the following precautions
could lead to serious or possibly fatal injury.
• Always turn OFF the power supply to the PLC before attempting any of
the following. Not turning OFF the power supply may result in malfunction
or electric shock.
• Mounting or dismounting the CPU board or expansion I/O board.
• Setting switches or rotary switches.
• Connecting or wiring the cables.
• Connecting or disconnecting the connectors.
!Caution
Failure to abide by the following precautions could lead to faulty operation of
the PLC or the system, or could damage the PLC. Always heed these precau-
tions.
• Fail-safe measures must be taken by the customer to ensure safety in the
event of incorrect, missing, or abnormal signals caused by broken signal
lines, momentary power interruptions, or other causes.
• Construct a control circuit so that power supply for the I/O circuits does
not come ON before power supply for the PLC. If power supply for the I/O
circuits comes ON before power supply for the PLC, normal operation
may be temporarily interrupted.
• If the operating mode is changed from RUN or MONITOR mode to PRO-
GRAM mode, with the IOM Hold Bit ON, the output will hold the most
recent status. In such a case, ensure that the external load does not
exceed specifications. (If operation is stopped because of an operation
error (including FALS instructions), the values in the internal memory of
the CPU board will be saved, but the outputs will all turn OFF.)
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
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