Safety Precautions - Mitsubishi Electric MELSECQ Series User Manual

Before using this product, please read this manual and the relevant manuals carefully and pay full attention
to safety to handle the product correctly.
The precautions given in this manual are concerned with this product. For the safety precautions of the
programmable controller system, please read the User's Manual for the CPU module.
In this manual, the safety precautions are classified into two levels: "
Under some circumstances, failure to observe the precautions given under "
serious consequences.
Observe the precautions of both levels because they are important for personal and system safety.
Make sure that the end users read this manual and then keep the manual in a safe place for future
reference.
[Design Precautions]
● Do not write data to "read-only area" or "reserved area" in the buffer memory of the intelligent
function module. Also do not turn ON/OFF the "reserved" signal in I/O signals to the programmable
controller CPU.
Doing any of these operations may cause a malfunction of the programmable controller system.
● Do not install the control lines and/or pulse input wiring together with the main circuit or power lines,
and also do not bring them close to each other.
Keep a distance of 150 mm (5.91 inch) or more between them.
Failure to do so may cause a malfunction due to noise.
[Installation Precautions]
● Use the programmable controller in the environment conditions given in the general specifications of
the User's Manual for the CPU module.
Failure to do so may cause an electric shock, fire, malfunction, or damage to or deterioration of the
product.
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SAFETY PRECAUTIONS

(Read these precautions before using this product.)
Indicates that incorrect handling may cause hazardous conditions,
WARNING
resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous conditions,
CAUTION
resulting in minor or moderate injury or property damage.
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WARNING
CAUTION
CAUTION
WARNING" and " CAUTION".
CAUTION" may lead to
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