Mitsubishi Electric MELSEC L Series User Manual page 5

[Design Precautions]
● Do not write any data to the "system area" and "write-protect area" (R) of the buffer memory in the
intelligent function module. Also, do not use any "use prohibited" signals as an output signal from the
head module to the intelligent function module. Doing so may cause malfunction of the programmable
controller system.
● If a communication cable (such as 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.
● During control of an inductive load such as a lamp, heater, or solenoid valve, a large current
(approximately ten times greater than normal) may flow when the output is turned from off to on.
Therefore, use a module that has a sufficient current rating.
● At power-on, a voltage may occur or a current may flow between output terminals of the analog output
module for a moment. In this case, start the control after analog outputs become stable.
[Installation Precautions]
● Shut off the external power supply (all phases) used in the system before mounting or removing a
module. Failure to do so may result in electric shock or cause the module to fail or malfunction.
[Installation Precautions]
● Use the head module in an environment that meets the general specifications in this manual. Failure
to do so may result in electric shock, fire, malfunction, or damage to or deterioration of the product.
● To interconnect modules, engage the respective connectors and securely lock the module joint levers
until they click. Incorrect interconnection may cause malfunction, failure, or drop of the module.
● 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.
● Do not directly touch any conductive parts and electronic components of the module. Doing so can
cause malfunction or failure of the module.
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WARNING
CAUTION
WARNING
CAUTION
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