Safety Precautions - Mitsubishi Electric MELSEC iQ-R Series User Manual

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.
The precautions given in this manual are concerned with this product only. For the safety precautions of the programmable
controller system, refer to the user's manual for the CPU module used.
In this manual, the safety precautions are classified into two levels: "
WARNING
CAUTION
Under some circumstances, failure to observe the precautions given under "
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 the safety remote I/O module detects an error in an external power supply or a failure in the
module, it turns off the outputs. Configure an external circuit to ensure that the power source of a
hazard is shut off by turning off the outputs. Failure to do so may result in an accident due to an
incorrect output or malfunction.
● When a load current exceeding the rated current or an overcurrent caused by a load short-circuit
flows, the safety remote I/O module defines it as a fault and turns off the outputs. Note that if the
overcurrent state continues for a long time, it may cause smoke and fire. To prevent this, configure an
external safety circuit, such as a fuse.
● At the start-up of the system, if the load power supply is short-circuited by the output wiring of the
safety remote I/O module, a load may turn on just after the power-on. Configure an interlock circuit to
ensure that the entire system will always operate safely.
● When a communication failure occurs in the network, data in the master module are held. Check Data
link status (each station) (SW00B0 to SW00B7) and configure an interlock circuit in the program to
ensure that the entire system will operate safely.
● When a communication failure occurs in the network, the failed station becomes the following status.
Check the communication status information and configure an interlock circuit in the program to
ensure that the entire system will operate safely. Failure to do so may result in an accident due to an
incorrect output or malfunction.
(1) All inputs from remote I/O stations are turned off.
(2) All outputs from remote I/O stations are turned off.
● Do not use any "use prohibited" signals as a safety remote I/O signal and a remote control/monitor
signal since they are used by the system. If any of the "use prohibited" signals are used (turned on or
off), the correct operation of the module cannot be guaranteed.
● Do not read/write data from/to the remote register since all areas of the remote register are "use
prohibited" areas. If data is read or written from/to the remote register, correct operation of the module
cannot be guaranteed.
2
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.
WARNING" and " CAUTION".
CAUTION" may lead to serious