SYSMAC CS1D Programmable Controllers
Safety Precautions
OMRON Corporation
OMRON Corporation 2018
All Rights Reserved
2828248-0B
Thank you for purchasing an OMRON Programmable Controller (PLC). To ensure safe operation, please be sure to read the safety precautions provided in this document along with all of
the user manuals for the Programmable Controller. Please be sure you are using the most recent versions of the user manuals. Contact your nearest OMRON representative to obtain
manuals. Keep these safety precautions and all user manuals in a safe location and be sure that they are readily available to the final user of the products.
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, com-
bustion systems, medical equipment, amusement machines, safety equipment, petrochem-
ical plants, 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.
Safety Precautions
Definition of Precautionary Information
!
DANGER
Indicates an imminently hazardous situation which, if not avoided,
will result in death or serious injury.
!
WARNING
Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
!
Caution
Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury, or property damage.
Warnings and Cautions
!
WARNING
Do not attempt to take any Unit apart while the power is being
supplied. Doing so may result in electric shock.
!
WARNING
Do not touch any of the terminals or terminal blocks while the
power is being supplied. Doing so may result in electric shock.
!
WARNING
Do not attempt to disassemble, repair, or modify any Units. Any
attempt to do so may result in malfunction, fire, or electric shock.
!
WARNING
Provide safety measures in external circuits, i.e., not in the Pro-
grammable Controller (CPU Unit including associated Units; re-
ferred to as “PLC”), in order to ensure safety in the system if an
abnormality occurs due to malfunction of the PLC or another ex-
ternal 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 countermeasure for such
errors, external safety measures must be provided to ensure 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–VDC output (service power supply to the PLC) is overloaded 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.
!
WARNING
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. Not doing so may result in serious accidents.
!
Caution
Pay careful attention to the polarities (+/–) when wiring the DC
power supply. A wrong connection may cause malfunction of 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 safety at the destination node before transferring a
program to another node or editing the I/O area. Doing either of
these without confirming safety may result in injury.
!
Caution
Tighten the screws on the terminal block of the AC Power Supply
Unit to the torque specified in the operation manual. The loose
screws may result in burning or malfunction.
!
Caution
Do not touch the Power Supply Unit during power–on, and im-
mediately after power–off. Hot surface may cause heat injury.
!
Caution
After programming (or re–programming) using the IOWR instruc-
tion, confirm that correct operation is possible with the new lad-
der program and data before starting actual operation. Any irreg-
ularities may cause the product to stop operating, resulting in
unexpected operation in machinery or equipment.
!
Caution
When the battery power is low or when no battery is inserted with
the CS1G/H/D–CPU
@@
H/HA/SA/P/S Units, the contents of the
user memory are saved in non–volatile memory. (Operation is
not stopped due to a memory error.) Accordingly, the PLC Sys-
tem can be operated even when the battery power is low or no
battery is inserted, but the DM, EM, HR, and Variables set to
Retain in function blocks areas become unstable in this condition.
When the contents of the DM, EM, HR, and Variables set to Re-
tain in function blocks areas are output with a program, use the
Battery Error Flag to stop output.
!
Caution
Caution is required when connecting peripheral devices, such as
a personal computer, to the PLC when Units with non–isolated
power supplies, such as the CS1W–CLK13/53/12/CLK52 (–V1),
that are connected to an external power supply are mounted to
the PLC. If the 24–V side is grounded on the external power
supply, a short will be created if the 0–V side of the peripheral
device is grounded. When connecting peripheral devices, either
ground the 0–V side of the external power supply or do not
ground the external power supply at all.
Operating Environment Precautions
!
Caution
Do not operate the control system in the following places:
•
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 temperature
•
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
!
Caution
The operating environment of the PLC System can have a large
effect on the longevity and reliability of the system. Improper op-
erating environments can lead to malfunction, failure, and other
unforeseeable problems with the PLC System. Be sure that the
operating environment is within the specified conditions at instal-
lation and remains within the specified conditions during the life
of the system.
Application Precautions
!
WARNING
Always heed these precautions. Failure to abide by the following
precautions could lead to serious or possibly fatal injury.
•
Always connect to 100 W or less when installing the Units. Not connecting to a ground of
100 W or less may result in electric shock.
•
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 Power Supply Units, I/O Units, CPU Units, or any other
Units
•
Assembling
the
Units
•
Setting DIP 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 or
PLC Units. Always heed these precautions.
• Always use the power supply voltage specified in the operation manuals. 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 ex-
ternal wiring. Insufficient safety measures against short–circuiting may result in burning.
• Do not apply voltages to the Input Units in excess of the rated input voltage. Excess
voltages may result in burning.
• Do not apply voltages or connect loads to the Output Units in excess of the maximum
switching capacity. Excess voltage or loads may result in burning.
• Disconnect the functional ground terminal when performing withstand voltage tests. Not
disconnecting the functional ground terminal may result in burning.
• Install the Unit properly as specified in the operation manual. Improper installation of the
Unit may result in malfunction.
• Be sure that all the mounting screws, terminal screws, and cable connector screws are
tightened to the torque specified in the relevant manuals. Incorrect tightening torque may
result in malfunction.
• Do not allow wire clippings, shavings, or other foreign material to enter any Unit. Other-
wise, Unit burning, failure, or malfunction may occur. Cover the Units or take other suita-
ble countermeasures, especially during wiring work.
• Do not allow foreign matter to enter the openings in the Unit. Doing so may result in Unit
burning, electric shock, or failure.
• Use crimp terminals for wiring. Do not connect bare stranded wires directly to terminals.
Connection of bare stranded wires may result in burning.
• Wire correctly and double–check all the wiring or the setting switches before turning ON
the power supply. Incorrect wiring may result in burning.
• Mount the Unit only after checking the connectors and terminal blocks completely.
• Be sure that the terminal blocks, connectors, Memory Cards, expansion cables, and other
items with locking devices are properly locked into place. Improper locking may result in
malfunction.
• Check the user program for proper execution before actually running it on the Unit. Not
checking the program may result in an unexpected operation.
• Check that the DIP switches and data memory (DM) are properly set before starting
operation.
• Set the Detect Low Battery Bit in the PLC Setup to “do not detect” before starting bat-
tery–less operation.
