Mitsubishi Electric MELSEC-Q Series User Manual page 4

[Design Precautions]
● Do not write any data in the "system area" of the buffer memory in the intelligent function module.
Also, do not use any "use prohibited" signals as an output signal from the CPU module to the
intelligent function module.
Doing so may cause malfunction of the programmable controller system.
[Design Precautions]
● Do not install the control lines or communication cables together with the main circuit lines or power
cables.
Keep a distance of 100mm or more between them.
Failure to do so may result in malfunction due to noise.
● When changing the operating status of the CPU module (such as remote RUN/STOP) from the
external device, select "Always wait for OPEN (Communication possible at STOP time)" for the "Initial
timing" setting in the network parameter.
The communication line will be closed when "Do not wait for OPEN (Communications impossible at
STOP time)" is selected and the remote STOP is executed from the external device.
Consequently, the CPU module cannot reopen the communication line, and the external device
cannot execute the remote RUN.
[Security Precautions]
● To maintain the security (confidentiality, integrity, and availability) of the programmable controller and
the system against unauthorized access, denial-of-service (DoS) attacks, computer viruses, and other
cyberattacks from external devices via the network, take appropriate measures such as firewalls,
virtual private networks (VPNs), and antivirus solutions.
[Operating Precautions]
● When changing data and operating status, and modifying program of the running programmable
controller from a personal computer connected to an intelligent function module, read relevant
manuals carefully and ensure the safety before operation.
Incorrect change or modification may cause system malfunction, damage to the machines, or
accidents.
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WARNING
CAUTION
WARNING
CAUTION