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SAFETY PRECAUTIONS
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(Read these precautions before using.)
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 instructions given in this manual are concerned with this product. For the safety instructions of the
programmable controller system, please read the CPU module user's manual.
In this manual, the safety instructions are ranked as "DANGER" and "CAUTION".
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DANGER
CAUTION
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Indicates that incorrect handling may cause hazardous conditions,
resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous conditions,
resulting in medium or slight personal injury or physical damage.
Note that the
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CAUTION level may lead to a serious consequence according to the circumstances.
Always follow the instructions of both levels because they are important to personal safety.
Please save this manual to make it accessible when required and always forward it to the end user.
[DESIGN PRECAUTIONS]
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DANGER
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When a communication error occurs in the PROFIBUS network, the status of the faulty station is
as follows. Configure an interlock circuit in the sequence program using the communication
status information (input X1, buffer memory 2040 to 2079) so that the system can operate
safely.
Erroneous outputs and mis-operation could cause accidents.
(1) The input data of the master station maintains the data before abnormality of the
communication.
(2) When the master station is down, the output state of each slave station will be in
accordance with the parameter settings.
(3) When any slave station is down, the output state of other slave stations will be in
accordance with the parameter settings of the master station.
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Do not output the "prohibited to use" signal as the output signal to an intelligent function module
from the PLC CPU.
Writing data into the "system area" or outputting a signal for "prohibited to use" may cause
system malfunction in the PLC.
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CAUTION
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When the PROFIBUS cable is laid, do not lay it close to main circuits or power lines.
They should be installed 100mm(3.9inch) or more from each other.
Not doing so could result in noise that would cause malfunctioning.
