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3Conformance to EC Directives
xii
1 Intended Audience
This manual is intended for the following personnel, who must also have knowl-
edge of electrical systems (an electrical engineer or the equivalent).
• Personnel in charge of installing FA systems.
• Personnel in charge of designing FA systems.
• Personnel in charge of managing FA systems and facilities.
2 General Precautions
The user must operate the product according to the performance specifications
described in the operation manuals.
Before using the product under conditions which are not described in the manual
or applying the product to nuclear control systems, railroad systems, aviation
systems, vehicles, combustion systems, medical equipment, amusement ma-
chines, safety equipment, and other systems, machines, and equipment that
may have a serious influence on lives and property if used improperly, consult
your OMRON representative.
Make sure that the ratings and performance characteristics of the product are
sufficient for the systems, machines, and equipment, and be sure to provide the
systems, machines, and equipment with double safety mechanisms.
This manual provides information for programming and operating the Unit. Be
sure to read this manual before attempting to use the Unit and keep this manual
close at hand for reference during operation.
WARNING It is extremely important that a Serial Communications Board and all related
units be used for the specified purpose and under the specified conditions,
especially in applications that can directly or indirectly affect human life. You
must consult with your OMRON representative before applying a Serial
Communications Board to the above mentioned applications.
3 Safety Precautions
WARNING Never attempt to disassemble any Units while power is being supplied. Doing so
may result in electric shock.
WARNING The CPU Unit refreshes I/O even when the program is stopped (i.e., even in
PROGRAM mode). Confirm safety thoroughly in advance before changing the
status of any part of memory allocated to I/O Units, Inner Boards, or Dedicated
I/O Units. Any changes to the data allocated to any Unit may result in
unexpected operation of the loads connected to the Unit. Any of the following
operation may result in changes to memory status.
• Transferring I/O memory data to the CPU Unit from a Programming Device.
• Changing present values in memory from a Programming Device.
• Force-setting/-resetting bits from a Programming Device.
• Transferring I/O memory files from a Memory Card or EM file memory to the
CPU Unit.
• Transferring I/O memory from a host computer or from another PC on a net-
work.
WARNING Never touch any of the terminals while power is being supplied. Doing so may
result in electric shock.
Caution Execute online edit only after confirming that no adverse effects will be caused
by extending the cycle time. Otherwise, input signals may not be read properly.