Mitsubishi FX3U-ENET, Руководство пользователя

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[Design Precautions]
!
DANGER
•
Do not write any data in the "system area" of the buffer memory of the extension device. When
writing a value to the buffer memory including "System Area," pay close attention not to change
the system bit. If data is written to the "system area" or the "use prohibited" signal is output,
there is a risk that the PLC system may malfunction.
•
When the program examples introduced in this manual are applied to the actual system,
examine the safety of the control in the target system.
!
CAUTION
•
When the status control (remote RUN/STOP) of the PLC is performed from the external device,
select the "Always wait for OPEN" parameter set by an user in advance. (Select with the initial
timing setting (BFM#24 b8) in the operational setting.) When "Do not wait for OPEN" is selected,
the communication line at remote STOP is closed. The communication line cannot be reopened
on the PLC side after that, and the remote RUN from the external device cannot start.
[Installation Precautions]
!
CAUTION
•
Use the product within the generic environment specifications described in chapter 3 of this
manual.
Never use the product in areas with excessive dust, oily smoke, conductive dusts, corrosive gas
(salt air, Cl
2
, H
2
S, SO
2
or NO
2
), flammable gas, vibration or impacts, or exposed to high
temperature, condensation, or rain and wind.
If the product is used in such conditions, electric shock, fire, malfunctions, deterioration or
damage may occur.
•
When drilling screw holes or wiring, make sure cutting or wire debris does not enter the
ventilation slits.
Failure to do so may cause fire, equipment failures or malfunctions.
•
Be sure to remove the dust proof sheet from the PLC's ventilation port when installation work is
completed. Failure to do so may cause fire, equipment failures or malfunctions.
•
Connect the extension cables securely to their designated connectors.
Unsecured connection may cause malfunctions.