Mitsubishi Electric MELSEC-Q Series User Manual page 4

[Design Precautions]
● To set a refresh device in the network parameter, select the device Y for the remote output (RY)
refresh device ("Remote Output (RY)"). If a device other than Y, such as M and L, is selected, the CPU
module holds the device status even after its status is changed to STOP. For how to stop data link,
refer to Page 320, Section 11.4.5 in this manual.
● If a CC-Link dedicated cable is disconnected, the network may be unstable, resulting in a
communication failure of multiple stations. Configure an interlock circuit in the program to ensure that
the entire system will always operate safely even if communications fail. Failure to do so may result in
an accident due to an incorrect output or malfunction.
[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.
[Installation Precautions]
● Use the programmable controller in an environment that meets the general specifications in the user's
manual for the CPU module used. Failure to do so may result in electric shock, fire, malfunction, or
damage to or deterioration of the product.
● To mount the module, while pressing the module mounting lever located in the lower part of the
module, fully insert the module fixing projection(s) into the hole(s) in the base unit and press the
module until it snaps into place. Incorrect mounting may cause malfunction, failure or drop of the
module. When using the programmable controller in an environment of frequent vibrations, fix the
module with a screw.
Tighten the screws within the specified torque range. Undertightening can cause drop of the screw,
short circuit or malfunction. Overtightening can damage the screw and/or module, resulting in drop,
short circuit, or malfunction. Shut off the external power supply (all phases) used in the system before
mounting or removing the module. Failure to do so may result in damage to the product.
● Shut off the external power supply (all phases) used in the system before mounting or removing the
module. Failure to do so may result in damage to the product.
● Do not directly touch any conductive parts and electronic components of the module. Doing so can
cause malfunction or failure of the module.
2
WARNING
CAUTION
CAUTION