Application Precautions - Omron SYSMAC CS Series Operation Manual

Application Precautions

!Caution The operating environment of the PLC System can have a large effect on the
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Application Precautions

!WARNING
• Locations close to power supplies.
longevity and reliability of the system. Improper operating environments can
lead to malfunction, failure, and other unforeseeable problems with the PLC
System. Be sure that the operating environment is within the specified condi-
tions at installation and remains within the specified conditions during the life
of the system.
Observe the following precautions when using the PLC System.
• You must use the CX-Programmer (programming software that runs on
Windows) if you need to program more than one task. A Programming
Console can be used to program only one cyclic task plus interrupt tasks.
A Programming Console can, however, be used to edit multitask pro-
grams originally created with the CX-Programmer.
• There are restrictions in the areas and addresses that can be accessed in
I/O memory of the CS-series CPU Units when using the C200H Special
I/O Units in combination with the following functions. (Refer to Appendix F
Restrictions in Using C200H Special I/O Units for details.)
• There are restrictions in data transfer with the CPU Unit when pro-
gramming transfers inside an ASCII Unit using the PLC READ, PLC
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
destination specifications).
• The DeviceNet output area for a C200HW-DRM21-V1 DeviceNet Mas-
ter 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 sys-
tem where allocations to the DeviceNet system will overlap with allo-
cations 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 com-
munications are attempted when the same bits are allocated to both
DeviceNet devices and I/O Units (which can occur even if automatic al-
location is used), the DeviceNet devices and I/O Units may both exhibit
faulty operation.
• Special bits and flags for PLC 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 PLC 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 PLC Link Units are also allocated
to I/O Units (which can occur even if automatic allocation is used), the
PLC 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.
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