Mitsubishi Electric MELSEC-A series User Manual page 3

(Be sure to read these instructions before use.)
Before using the product, read this and relevant manuals carefully and handle the
product correctly with full attention to safety.
In this manual,
"DANGER" and "CAUTION".
DANGER
CAUTION
Under some circumstances, failure to observe the
instructions may also lead to serious results.
Be sure to observe the instructions of both levels to ensure the safety.
Please keep this manual in a safe place for future reference and also pass this
manual on to the end user.
[DESIGN PRECAUTIONS]
Create a safety circuit outside the programmable controller to ensure the
whole system will operate safely even if an external power failure or a
programmable controller failure occurs.
Otherwise, incorrect output or malfunction may cause an accident.
(1) For an emergency stop circuit, protection circuit and interlock circuit that
is designed for incompatible actions such as forward/reverse rotation or
for damage prevention such as the upper/lower limit setting in
positioning, any of them must be created outside the programmable
controller.
Install the emergency stop switch outsid the controlpanel so that workers
can operate it easily.
SAFETY PRECAUTIONS
SAFETY PRECAUTIONS
Indicates that incorrect handling may cause hazardous
conditions, resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous
conditions, resulting in minor or moderate injury and/or
property damage.
DANGER
are classified into 2 levels:
A-1
CAUTION
level