A-1
SAFETY PRECAUTIONS
(Read these precautions before using this product.)
Before using this product, please read this manual and the relevant manuals
carefully and pay full attention to safety to handle the product correctly.
In this manual, the safety precautions are classified into two levels:
"
WARNING" and "
CAUTION".
Under some circumstances, failure to observe the precautions given under
"
CAUTION" may lead to 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]
WARNING
When a communication error occurs in the PROFIBUS-DP, the status of the
faulty station is as follows. Configure an interlock circuit in the sequence
program using the communication status information (input X1) so that the
system can operate safely.
Erroneous outputs and mis-operation could cause accidents.
(1) The input data from the master station remains unchanged from the data
prior to the communication error.
(2) When the master station becomes faulty, the output status of the
A1SJ71PB93D will be as in the parameter settings of the master station.
(3) When any A1SJ71PB93D is down, the output state of other slave stations
will be in accordance with the parameter settings of the master station.
WARNING
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
