Safety Precautions - Mitsubishi Electric SW0DNC-MNETH-B User Manual

Before using this product, read this manual and the relevant manuals introduced in this manual carefully
and handle the product correctly with full attention to safety.
Note that these precautions apply only to this product. Refer to the user's manual of the CPU module for
safety precautions on programmable controller systems.
In this manual, the safety instructions are ranked as "
WARNING
CAUTION
Note that failure to observe the
on the circumstances.
Be sure to observe the instructions of both levels to ensure personal safety.
Please keep this manual in accessible place and be sure to forward it to the end user.
[Design Instructions]
 Make sure to see this manual for information about each station's operating status when a
communication error occurs in the network. Erroneous outputs and malfunctions may result in
serious accidents.
 If a coaxial cable is disconnected, this may destabilize the line, and a data link communication
error may occur in multiple stations. Make sure to create an interlock circuit in the sequence
program so that the system will operate safely even if the above error occurs. Failure to do so
may result in a serous accident due to faulty output or malfunctions.
 Provide a safety circuit outside the programmable controller so that the entire system will
operate on the safety side even when an error occurs with the personal computer.
There is a risk of an accident due to faulty output or malfunctioning.
(1) Construct circuits outside the programmable controller, including an emergency stop circuit,
protection circuit, interlock circuit for reciprocal operations such as forward and reverse, and
interlock circuit for positioning high and low limits to prevent damage to the equipment.
(2) If the station in which the board is installed is disconnected from the data link due to a data
link error, the data output from that station and written in other stations will remain the same
as immediately before the error occurred in the data link. This data will be retained until the
data link for that station is reopened (returned to system).
Provide a mechanism to monitor the status of data link and handle errors for each station
that is connected to the data link system.
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 SAFETY PRECAUTIONS 
(Be sure to read these instructions before using the 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.
CAUTION level instructions may also lead to serious results depending
!
WARNING " and "
WARNING
!
CAUTION".
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