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Safety Precautions 3
• Do not allow the bank of the EM Area with the number specified for alloca-
tion to the HMI (human-machine interface) data to overlap with any other
area used by the CPU Unit or other Units. The block allocated for the HMI
is specified in ITEM 050 (EM Area Bank Allocated for HMI Memory = 0 to
12) of the System Common block (Block Model 000). If areas overlap, the
system may operate in an unexpected manner, which may result in injury.
• Do not allow the area to which user link table data is written to overlap
with any other area used by the CPU Unit or other Units. If areas overlap,
the system may operate in an unexpected manner, which may result in
injury.
• When using a user link table to write bit data to I/O memory in the CPU
Unit. Never allow ladder programming or communications processes in
the CPU Unit to write to any bits in the words in which bits are written from
a user link table. Depending on the timing, any attempts to write to these
words from ladder programming or communications processes may be
ignored. Example: If tag A in a user link table writes to bit 00 of W000 and
an OUT instruction in the ladder program in the CPU Unit write to bit 01 of
W000, the write from the ladder program may be ignored.
• Analog Input/Output Units used in combination with the Loop Controller
must be mounted correctly, and the unit number set on the front panel of
the Analog Input/Output Unit must match the unit number set on the Field
Terminal block. If the unit numbers do not match, input/output (read/write)
is performed on the data of another Special I/O Unit (whose unit number
is set on the Field Terminal block).
• The defaults of the System Common block on the Loop Controller must
be set correctly.
• Always stop the operation of the Loop Controller before converting any of
the EM Area to file memory. If any part of the EM Area that is being used
by the Loop Controller for the s is converted to file memory during Board
operation, the system may operate in an unexpected manner, which may
result in injury.
!WARNING Do not use battery-free operation for the CS1-H CPU Unit or the CPU Unit
element of a Process-control CPU Unit or Loop-control CPU Unit. If battery-
free operation is used for the CPU Unit or CPU Unit element, the contents of
the EM Area will not be stable when the power supply is turned ON, possibly
causing illegal values in the HMI data in the Loop Controller.
!WARNING Do not perform processing in such a way that the Loop Controller and CPU
Unit perform writing on identical I/O memory addresses allocated to an con-
tact output or analog output to an external Unit. If writing is performed on iden-
tical addresses, the externally connected load may act unexpectedly and
cause injury.
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