Omron CS1W-LC001 Operation Manual page 18

Application Precautions
Caution
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Failure to abide by the following precautions could lead to faulty operation of
the PC or the system, or could damage the PC or PC Units. Always heed
these precautions.
To hold analog outputs or contact outputs at specific values (for example,
maximum value or minimum value) when the Loop Control Unit has
stopped running, create a Step Ladder Program on the CPU Unit so that
each of the allocated relays on the Analog Output Unit or Contact Output
Unit are set to a specific value taking the b contact of the Loop Control
Unit Running flag (bit 00 allocated relay n word) as the input conditions.
When a fatal error occurs on the CPU Unit (including during execution of
the FALS command), the Loop Control Unit also stops running. To hold
the analog output to the previous value before the stop occurred, and to
set the analog output to either the minimum value or maximum value, use
the output hold function of the Analog Output Unit or Analog Input/Output
Unit.
Before turning ON the power to the PC, make sure that the facilities are
safe.
The analog output values and contact outputs from the Loop Control Unit
are updated at the same time that the power to the PC is turned ON
regardless of the operation mode of the CPU Unit (including the
PROGRAM mode). (Internally, the analog output values and contact
outputs are sent via the CPU Unit to the Basic I/O Unit and Analog Output
Unit.)
The Loop Control Unit itself does not have a human interface. So, an
external interface such as CX-Process Monitor must be provided.
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.
Before touching the PC, be sure to first touch a grounded metallic object
in order to discharge any static build-up.
Otherwise, it might result in a malfunction or damage.
Before you replace the battery while the Loop Control Unit is ON, be sure
to touch a grounded metal object to discharge any static electricity from
your body
Never short-circuit the plus and minus poles of the battery, charge,
disassemble or heat the battery, or throw the battery into a fire.
Interlock circuits, limit circuits, and similar safety measures in external
circuits (i.e. not in the Programmable Controller) must be provided by the
customer.
Always use the power supply voltage specified in this manual. An
incorrect voltage may result in malfunction or burning.
Take appropriate measures to ensure that the specified power with the
rated voltage and frequency is supplied. Be particularly careful in places
where the power supply is unstable. An incorrect power supply may result
in malfunction.
Install external breakers and take other safety measures against short-
circuiting in external wiring. Insufficient safety measures against short-
circuiting may result in burning.
Do not apply voltages to input sections in excess of the rated input
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