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5
Application Precautions
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There are restrictions in the areas and addresses that can be accessed in I/O
memory of the CS1-series CPU Units when using the C200H Special I/O Units
in combination with the following functions.
•
There are restrictions in data transfer with the CPU Unit when program-
ming transfers inside an ASCII Unit using the PC READ, PC WRITE, and
similar commands.
•
There are restrictions in data transfer with the CPU Unit for allocated bits
and DM area specifications (areas and addresses for source and destina-
tion specifications).
•
The DeviceNet (CompoBus/D) output area for a DeviceNet Master Unit
(CIO 0050 to CIO 0099) overlaps with the I/O bit area (CIO 0000 to CIO
0319). Do not use automatic allocations for I/O in any system where al-
locations to the DeviceNet system will overlap 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 automatic 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) overlap
with the I/O bit area (CIO 0000 to CIO 0319). Do not use automatic alloca-
tions 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 Device or the
CX-Programmer to manually allocate I/O to I/O Units, being sure that the
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 attempted when the spe-
cial 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.
WARNING
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 con-
necting 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 ter-
minals on the Power Supply Unit.
•
Always turn OFF the power supply to the PC before attempting any of the fol-
lowing. Not turning OFF the power supply may result in malfunction or electric
shock.
•
Mounting or dismounting 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.
Caution
Failure to abide by the following precautions could lead to faulty operation of the
PC or the system, or could damage the PC or PC Units. Always heed these pre-
cautions.
•
When using a CPU Unit for the first time, install the CS1W-BAT1 Battery pro-
vided with the Unit and clear all memory areas from a Programming Device
before starting to program.