Mitsubishi QJ71LP21 Reference Manual page 6

[Setup and Maintenance Precautions]
• Please read this manual thoroughly and confirm the safety enough before starting online
operations (especially, program modifications, forced outputs, and operating status
modifications), which are performed by connecting GX Developer via the MELSECNET/H
network system to a CPU module running on another station. Performing incorrect online
operations may damage the machinery or result in accidents.
• Never disassemble or modify the module. This may cause breakdowns, malfunctions, injuries or fire.
• Use any radio communication device such as a cellular phone or a PHS phone more than 25cm
(9.85 inch) away in all directions of the PLC.
Not doing so can cause a malfunction.
• Completely turn off the externally supplied power used in the system before mounting or
removing the module. Failure to do so may damage the module or result in malfunctions.
For the remote I/O network systems of function version D or later, online module change can be
performed. However, the modules which can be replaced online are limited, and replacement
procedures are determined for each module. For details, refer to the section of online module
replacement in this manual.
• Do not mount/remove the module onto/from base unit more than 50 times (IEC61131-2-
compliant), after the first use of the product.
Failure to do so may cause the module to malfunction due to poor contact of connector.
• Do not touch the terminals while the power is on. This may cause breakdowns, malfunctions,
injuries or fire.
• Switch off all phases of the externally supplied power used in the system when cleaning the
module or retightening the terminal or module mounting screws. Failure to completely shut off
all phases of the external power supply may cause module breakdowns and malfunctions. If the
screws are loose, it may cause the module to short-circuit, malfunction or fall off. If the screws
are tightened excessively, it may damage the screws and cause the module to short circuit,
malfunction or fall off.
• Before handling the module, always touch grounded metal, etc. to discharge static electricity
from the human body.
Failure to do so can cause the module to fail or malfunction.
[Disposal Precautions]
• When disposing of this product, treat it as industrial waste.
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CAUTION
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CAUTION
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