Safety Precautions - Mitsubishi Electric MELSEC Q 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 only. For the safety precautions of the
programmable controller system, refer to the user's manual for the CPU module used.
In this manual, the safety precautions are classified into two levels: "
WARNING
CAUTION
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]
● Configure safety circuits external to the programmable controller to ensure that the entire system
operates safely even when a fault occurs in the external power supply or the programmable controller.
Failure to do so may result in an accident due to an incorrect output or malfunction.
(1) When using a servo amplifier with Servo ON signal, connect the signal to the module. When using
a servo amplifier whose control cannot be stopped through Servo ON signal, satisfy the following.
• Analog voltage must be 0V (motor stop) to power off the programmable controller.
(2) Emergency stop circuits, protection circuits, and protective interlock circuits for conflicting
operations (such as forward/reverse rotations or upper/lower limit positioning) must be configured
external to the programmable controller.
(3) OPR (Original Point Return) is controlled by two kinds of data: OPR direction and OPR speed.
Deceleration starts when the near-point dog turns on. If an incorrect OPR direction is set, motion
control may continue without deceleration. To prevent machine damage caused by this, configure
an interlock circuit external to the programmable controller.
● Do not write any data to the "system area" of the buffer memory in the intelligent function module.
Also, do not use any "use prohibited" signal as an output signal from the CPU module to the intelligent
function module. Doing so may cause malfunction of the programmable controller system.

SAFETY PRECAUTIONS

(Read these precautions before using this product.)
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 or property damage.
WARNING
WARNING" and " CAUTION".
CAUTION" may lead to
1