Mitsubishi Electric MELSEC Q Series User Manual page 5

[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 (3.94 inches) or more between them. Failure to do so may result
in malfunction due to noise.
● When a device such as a lamp, heater, or solenoid valve is controlled through an output module, a
large current (approximately ten times greater than normal) may flow when the output is turned from
off to on. Take measures such as replacing the module with one having a sufficient current rating.
● After the CPU module is powered on or is reset, the time taken to enter the RUN status varies
depending on the system configuration, parameter setting, and/or program size. Design circuits so
that the entire system will always operate safely, regardless of the time.
● While registering various settings, do not power OFF the station with a module installed, and reset
the CPU module. Powering off the station with a module installed and registering the CPU module
during registration make the internal ROM setting data uncertain and re-setting and re-registration
are required. Moreover, it will result in module fault and malfunction.
● When the CPU module or remote I/O module parameters are modified, be sure to reset the CPU
module. Previous data remaining in the module may cause the module to fail or malfunction.
[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.
CAUTION
WARNING
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