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5
[STARTUP AND MAINTENANCE PRECAUTIONS]
● Make sure to observe the following precautions in order to prevent any damage to the machinery or
accidents due to malfunction of the PLC caused by abnormal data written to the PLC due to the
effects of noise.
- Do not bundle the power line, control line and communication cables together with or lay them
close to the main circuit, high-voltage line, load line or power line. As a guideline, lay the power
line, control line and connection cables at least 100 mm (3.94") away from the main circuit, high-
voltage line, load line or power line.
- Ground the shield of the shield wire or shielded cable at one point on the PLC. However, do not
use common grounding with heavy electrical systems.
- Ground the shield of the analog input/output cable at one point on the signal receiving side. Do
not use common grounding with heavy electrical systems.
WARNING
● Do not touch any terminal while the PLC's power is on. Doing so may cause electric shock or
malfunctions.
● Before cleaning or retightening terminals, cut off all phases of the power supply externally. Failure to
do so may cause electric shock.
● Before modifying the program in mid-operation, forcing output, running or stopping the PLC, read
through this manual carefully, and ensure complete safety. An operation error may damage the
machinery or cause accidents.
● Do not change the program in the PLC from two or more peripheral equipment devices at the same
time. (i.e. from an engineering tool and a GOT) Doing so may cause destruction or malfunction of the
PLC program.
● Use the battery for memory backup in conformance to this manual.
- Use the battery for the specified purpose only.
- Connect the battery correctly.
- Do not charge, disassemble, heat, put in fire, short-circuit, connect reversely, weld, swallow or
burn the battery, or apply excessive force (vibration, impact, drop, etc.) to the battery.
- Do not store or use the battery at high temperatures or expose to direct sunlight.
- Do not expose to water, bring near fire or touch liquid leakage or other contents directly.
Incorrect handling of the battery may cause excessive heat, bursting, ignition, liquid leakage or
deformation, and lead to injury, fire or failures and malfunction of facilities and other equipment.
CAUTION