Omron CS1W-MC221 -, Operation Manual

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Operating Environment Precautions 4
• The CPU Unit or MC Unit outputs may remain ON or OFF due to deposits
on or burning of the output relays, or destruction of the output transistors.
As a countermeasure for such problems, external safety measures must
be provided to ensure safety in the system.
• When the 24-VDC output (service power supply to the CPU Unit) is over-
loaded or short-circuited, the voltage may drop and result in the outputs
being turned OFF. As a countermeasure for such problems, external
safety measures must be provided to ensure safety in the system.
!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.
!Caution
Confirm the safety of the destination node before transferring a program to the
node or changing the contents of I/O memory. Doing either of these without
confirming safety may result in injury.
!Caution Connect the RUN command output (RUN signal) to the Servo Driver. Other-
wise, the motor may run when the power is turned ON or OFF or when en
error occurs in the Unit.
!Caution Do not save data into the flash memory during program execution or while the
motor is running. Otherwise, unexpected operation may be caused.
!Caution Do not reverse the polarity of the 24-V power supply. The polarity must be cor-
rect. Otherwise, the motor may start running unexpectedly and may not stop.
4 Operating Environment Precautions
!Caution Do not operate the control system in the following locations:
• 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.