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]
When a communication error occurs on PROFIBUS-DP, the status of the faulty station is as shown
below.
Create an interlock circuit in the sequence program using the communication status information to
ensure the system operates safely (Input X1, buffer memory 5A20
An erroneous output or malfunction may cause accidents.
(1) The QJ71PB92V holds the input data before the communication failure.
(2) When the QJ71PB92V has gone down, the output status of each DP-Slave is dependent on the
QJ71PB92V parameter setting on GX Configurator-DP.
(3) When a DP-Slave has gone down, the output status of the other DP-Slaves is dependent on the
QJ71PB92V parameter setting on GX Configurator-DP.
Do not output the "use prohibited" signal as the output signal to an intelligent function module from
the programmable controller CPU.
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" may lead to
to 5B19 (23072 to 23321)).
H H
CAUTION"
A
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