SAFETY PRECAUTIONS
(Read these precautions before using.)
When using Mitsubishi equipment, thoroughly read this manual and the associated manuals introduced
in this manual. Also pay careful attention to safety and handle the module properly.
These precautions apply only to Mitsubishi equipment. Refer to the CPU module user’s manual for a
description of the PLC system safety precautions.
These
•
SAFETY PRECAUTIONS
•
classify the safety precautions into two categories: “DANGER” and
“CAUTION”.
DANGER
Procedures which may lead to a dangerous condition and cause death or
serious injury if not carried out properly.
CAUTION
Procedures which may lead to a dangerous condition and cause superficial
to medium injury, or physical damage only, if not carried out properly.
Depending on circumstances, procedures indicated by
CAUTION
may also be linked to serious results.
In any case, it is important to follow the directions for usage.
Store this manual in a safe place so that you can take it out and read it whenever necessary. Always
forward it to the end user.
[DESIGN PRECAUTIONS]
DANGER
z
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.
z
If a stop error occurs in the CPU module, the communication status is as described below.
(1) Communication with the slave station is stopped.
(2) For the input data received from the slave station, the values at CPU module stop error occurrence are
held.
(3) The output data sent from the AJ71PB92D/A1SJ71PB92D to the slave station are cleared.
CAUTION
z
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.