Programmable Controller PLC Machinery Spare Parts
Note
WARNING
In the Programmable Controller (CPU Unit including associated
Units; referred to as"PLC), in order to ensure safety in the system
if an abnormality occurs due to malfunction of the PLC or another
externa actor affecting the PLC operation Not doing so may esult in
serious accidents
Emergency stop circuits, interlock circuits, limit circuits, and
similar safety measures must be provided in external control
circuits
The PLC will tur OFF all outputs when its self-diagnosis function
detects any error or hen a severe failure alarm ( FALS)instruction
is executed. Unexpected operation however, may still occur for
errors in the /O control section, errors in O memory, and other
errors that cannot be detected by the self-diagnosis function. As a
countermea sure for such all errors, extemal safety measures must
be provided to ensure safety in
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 o the PLC) is
overloaded or short-circuited, the voltage may drop and result in
the outputs being tured OFF As acountermeasure fo such problems,
extemal safety measures must be provided to ensure safety in the
system
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 specincations
Locations subject to condensation as there sult of severe changes
in temperature
Locations subject to corrosive or flammable gases
Locations subject to dust(especially iron dust)orsalts
Locations subject to exposure to water oil or chemicals
Locations subject to shock or vibration
when installing systems in thef ollowing locations:
Locations subject to static electricity or other forms of noise
Locations subject to strong electro magnetic fields
Locations subject to possible exposure to radio activity
Locations close top ower supplies
Shipment
