Intended Audience; General Precautions; Safety Precautions - Omron SYSMAC CS1 Operation Manual

Safety Precautions

1

Intended Audience

2

General Precautions

WARNING
!
3

Safety Precautions

WARNING
!
WARNING
!
xvi
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.
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 OMRON
PLCs. Be sure to read this manual before attempting to use the software and
keep this manual close at hand for reference during operation.
It is extremely important that a PLC and all PLC 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 PLC System to the above-mentioned
applications.
Do not attempt to disassemble or touch the inside of the SYSMAC CS1 Board
while the power is being supplied. Doing so may result in electric shock.
Provide safety measures in external circuits, i.e., not in the Programmable
Controller (referred to as "PLC"), in order to ensure safety in the system if an
abnormality occurs due to malfunction of the PLC or another external factor
affecting the PLC operation. Not doing so may result in serious accidents.
• Emergency stop circuits, interlock circuits, limit circuits, and similar safety
measures must be provided in external control circuits.
• The PLC will turn OFF all outputs when its self-diagnosis function detects any
error or when a severe failure alarm (FALS) instruction is executed. As a coun-
termeasure for such errors, external safety measures must be provided to en-
sure safety in the system.
• The PLC outputs may remain ON or OFF due to deposition 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-V DC output (service power supply to the PLC) is overloaded or
short-circuited, the voltage may drop and result in the outputs being turned
3