Precautions For Safe Use - Omron CJ1W-ECT21 Operation Manual

Precautions for Safe Use

Online Editing
When performing online editing with the combination of a CPU Unit with a unit version of 1.04 or later
and Sysmac Studio version 1.05 or higher, the CPU Unit saves a program updated by the online editing
to built-in non-volatile memory. Sysmac Studio shows a message that it is in a backup operation. Do not
turn OFF the power supply to the Controller while this message is displayed. If the power supply to the
Controller is turned OFF, a Controller error will occur when power is reapplied.
Disassembly and Dropping
• Do not attempt to disassemble, repair, or modify any Units. Doing so may result in malfunction or fire.
• Do not drop any Unit or subject it to abnormal vibration or shock. Doing so may result in Unit malfunc-
tion or burning.
Transporting
• When transporting the Unit, use special packing boxes and protect it from being exposed to exces-
sive vibration or impacts during transportation.
Mounting
• After connecting Power Supply Units, CPU Units, I/O Units, Special I/O Units, or CPU Bus Units
together, secure the Units by sliding the sliders at the top and bottom of the Units until they click into
place. Correct operation may not be possible if the Units are not securely properly.
Installation
• Always connect to a ground of 100 Ω or less when installing the Units. A ground of 100 Ω or less
must be installed when shorting the GR and LG terminals on the Power Supply Unit.
• Install the Unit properly. Improper installation of the Unit may result in malfunction.
Wiring
• Follow the instructions in this manual to correctly perform wiring.
Double-check all wiring and switch settings before turning ON the power supply.
• Do not pull on the cables or bend the cables beyond their natural limit.
Do not place heavy objects on top of the cables or other wiring lines. Doing so may break the cables.
• Mount terminal blocks and connectors only after checking the mounting location carefully.
Be sure that the terminal blocks, expansion cables, and other items with locking devices are properly
locked into place.
• Before you connect a computer to the CPU Unit, disconnect the power supply plug of the computer
from the AC outlet. Also, if the computer has an FG terminal, make the connections so that the FG
terminal has the same electrical potential as the FG (GR) terminal on the Power Supply Unit. A differ-
ence in electric potential between the computer and Controller may cause failure or malfunction.
• Use crimp terminals for wiring. Do not connect bare stranded wires directly to terminals. Incorrect wir-
ing may result in burning.
CJ-series EtherCAT Slave Units Operation Manual for NJ-series CPU Unit (W542)
Precautions for Safe Use
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