Application Precautions - Omron GRT1 - 27-11-2006 Operation Manual

Application Precautions

!Caution The operating environment of the GRT1-PRT PROFIBUS Communication
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Application Precautions

!WARNING
!Caution Failure to abide by the following precautions could lead to faulty operation of
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Unit can have a large effect on the longevity and reliability of the system.
Unsuitable operating environments can lead to malfunction, failure and other
unforeseeable problems with the system. Ensure that the operating environ-
ment is within the specified conditions at installation time and remains that
way during the life of the system. Follow all installation instructions and pre-
cautions provided in the operation manuals.
Observe the following precautions when using the GRT1-PRT PROFIBUS
Communication Unit.
Failure to abide by the following precautions could lead to serious or possibly
fatal injury. Always heed these precautions.
• Always connect to a class-3 ground (100
Units.
the Unit or the system. Always heed these precautions.
• Install double safety mechanisms to ensure safety against incorrect sig-
nals that may be produced by broken signal lines or momentary power
interruptions.
• When adding a new device to the network, make sure that the baud rate
is the same as other stations.
• When adding a new SmartSlice I/O Unit to the Communication Unit, make
sure that the GRT1-PRT PROFIBUS Communication Unit is powered
down, to prevent unexpected results when starting up the new station.
• Use specified communication cables.
• Do not extend connection distances beyond the ranges given in the spec-
ifications.
• Always turn OFF the power supply to the personal computer, Slaves, and
Communication Units before attempting any of the following:
• Mounting or dismounting the GRT1-PRT PROFIBUS Communication
Unit, Power Supply Units, I/O Units, CPU Units, or any other Units.
• Assembling a Unit.
• Setting DIP-switches or rotary switches.
• Connecting or wiring the cables.
• Connecting or disconnecting connectors.
• Be sure that all the mounting screws, terminal screws, Unit mounting
screws, and cable connector screws are tightened to the torque specified
in the relevant manuals. Incorrect tightening torque may result in malfunc-
tion.
• Always use the power supply voltage specified in this manual.
• Double-check all the wiring and connection of terminal blocks and con-
nectors before mounting the Units.
Ω
or less) when installing the
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