Omron SYSMAC CS Series Programming Manual page 13

Application Precautions
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&DXWLRQ Failure to abide by the following precautions could lead to faulty operation of
with allocations to I/O Units. Instead, use a Programming Device or the
CX-Programmer to manually allocate I/O for the DeviceNet devices,
being sure that the same words and bits are not allocated more than
once, and transfer the resulting I/O table to the CPU Unit. If DeviceNet
communications are attempted when the same bits are allocated to
both DeviceNet devices and I/O Units (which can occur even if auto-
matic allocation is used), the DeviceNet devices and I/O Units may
both exhibit faulty operation.
• Special bits and flags for PC Link Units (CIO 0247 to CIO 0250) over-
lap with the I/O bit area (CIO 0000 to CIO 0319). Do not use automatic
allocations for I/O in any system where allocations to the I/O Units will
overlap with allocations to I/O Units. Instead, use a Programming De-
vice or the CX-Programmer to manually allocate I/O to I/O Units, being
sure that the special bits and flags for PC Link Units are not used, and
transfer the resulting I/O table to the CPU Unit. If operation is attempt-
ed when the special bits and flags for PC Link Units are also allocated
to I/O Units (which can occur even if automatic allocation is used), the
PC Link Units and I/O Units may both exhibit faulty operation.
Always heed these precautions. Failure to abide by the following precautions
could lead to serious or possibly fatal injury.
• Always connect to a ground of 100 Ω or less when installing the Units. Not
connecting to a ground of 100 Ω or less may result in electric shock.
• A ground of 100 Ω or less must be installed when shorting the GR and LG
terminals on the Power Supply Unit.
• Always turn OFF the power supply to the PC before attempting any of the
following. Not turning OFF the power supply may result in malfunction or
electric shock.
• Mounting or dismounting Power Supply Units, I/O Units, CPU Units,
Inner Boards, or any other Units.
• Assembling the Units.
• Setting DIP switches or rotary switches.
• Connecting cables or wiring the system.
• Connecting or disconnecting the connectors.
the PC or the system, or could damage the PC or PC Units. Always heed
these precautions.
• A CJ-series CPU Unit is shipped with the battery installed and the time
already set on the internal clock. It is not necessary to clear memory or
set the clock before application, as it is for the CS-series CS1 CPU Units.
• When using a CS-series CS1 CPU Unit for the first time, install the CJ1W-
BAT1 Battery provided with the Unit and clear all memory areas from a
Programming Device before starting to program. When using the internal
clock, turn ON power after installing the battery and set the clock from a
Programming Device or using the DATE(735) instruction. The clock will
not start until the time has been set.
• When creating an AUTOEXEC.IOM file from a Programming Device (a
Programming Console or the CX-Programmer) to automatically transfer
data at startup, set the first write address to D20000 and be sure that the
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