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SAFETY PRECAUTIONS
(Always read these instructions before using this product)
Before using this product, please read this manual and the relevant manuals introduced in this manual
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, please read the User's Manual for the CPU module used.
In this manual, the safety precautions are classified into two levels: " WARNING" and " CAUTION".
Note that the CAUTION level may lead to a serious consequence according to the circumstances.
Observe the precautions of both levels because they are important for personal and system safety.
Please save this manual to make it accessible when required and always forward it to the end user.
[DESIGN PRECAUTIONS]
WARNING
● For each station's operating status in the case of a communication error in the network, refer to this
manual.
A malfunction due to a communication error may result in an accident.
● To control a running programmable controller (data modification) by connecting GX Developer to a
CPU module or connecting a personal computer to an intelligent function module (special function
module), create an interlock circuit on the sequence program so that the entire system will function
safely all the time.
Also, before performing any other controls (e.g. program modification, operating status change
(status control)) to the programmable controller, read the manual carefully and ensure the safety.
Especially, in the case of controlling a remotely-located programmable controller from an external
device, a programmable controller side problem could not be resolved immediately due to data
communication failure.
To prevent this, establish corrective procedures for communication failure between the external
device and the programmable controller CPU, as well as creating an interlock circuit on the program.
CAUTION
● Do not install the control lines and/or communication cables together with the main circuit or power
cables, and also do not bring them close to each other.
Keep a distance of 100mm (3.94 inch) or more between them. Failure to do so may cause a
malfunction due to noise.
WARNING
CAUTION
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.