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[Startup and Maintenance Precautions]
CAUTION
The online operations conducted for the CPU module being operated, connecting the peripheral
device (especially, when changing data or operation status), shall be conducted after the manual has
been carefully read and a sufficient check of safety has been conducted.
Operation mistakes could cause damage or problems with of the module.
Do not disassemble or modify the modules.
Doing so could cause trouble, erroneous operation, injury, 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. Not doing so could result in damage to the product.
Note that the module can be changed online (while power is on) in the system that uses the CPU
module compatible with online module change or on the MELSECNET/H remote I/O station.
Note that there are restrictions on the modules that can be changed online (while power is on) , and
each module has its predetermined changing procedure.
For details, refer to QCPU User's Manual (Hardware Design, Maintenance and Inspection) and the
online module change section in the manual of the module compatible with online module change.
Do not mount/remove the module to/from the base unit or terminal block more than 50 times (IEC
61131-2 compliant), after the first use of the product.
Failure to do so may cause module malfunctions.
Do not drop or give an impact to the battery mounted to the module.
Doing so may damage the battery, causing the battery fluid to leak inside the battery.
If the battery is dropped or given an impact, dispose of it without using.
Before touching the module, always touch grounded metal, etc. to discharge static electricity from
human body, etc.
Not doing so can cause the module to fail or malfunction.
