Programmable Controller PLC Tobacco Machinery Spare Parts

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

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