Omron CX-PROGRAMMER V9 - REV 12-2009 Operation Manual page 13

OMRON
Application Precaution
Observe the following precautions when using the CX-Programmer.
• Observe the following precautions before starting the CX-Programmer.
• Exit all applications not directly related to the CX-Programmer.
Particularly exit any software such as screen savers, virus checkers,
email or other communications software, and schedulers or other
applications that start up periodically or automatically.
• Disable sharing hard disks, printers, or other devices with other
computers on any network.
• With some notebook computers, the RS-232C port is allocated to a
modem or an infrared port by default. Follow the instructions in
documentation for your computer and enable using the RS-232C port
as a normal serial port.
• With some notebook computers, the default settings for saving
energy do not supply the rated power to the RS-232C port. There
may be both Windows settings for saving energy, as well as setting
for specific computer utilities and BIOS. Following the instructions in
documentation for your computer, disable all energy saving settings.
• Do not turn OFF the power supply to the PLC or disconnect the
connecting cable while the CX-Programmer is online with the PLC. The
computer may malfunction.
• With the CS/CJ-series PLCs, when creating an AUTOEXEC.IOM file
from the CX-Programmer to automatically transfer data at startup, set the
first write address to D20000 and be sure that the size of data written
does not exceed the size of the DM Area. When the data file is read from
the Memory Card at startup, data will be written in the CPU Unit starting
at D20000 even if another address was set when the AUTOEXEC.IOM
file was created. Also, if the DM Area is exceeded (which is possible
when the CX-Programmer is used), the remaining data will be written to
the EM Area. Refer to information on file operations in the CS/CJ-series
Programming Manual for details.
• Confirm that no adverse effect will occur in the system before attempting
any of the following. Not doing so may result in an unexpected operation.
Changing the operating mode of the PLC.
• Force-setting/force-resetting any bit in memory.
• Changing the present value of any word or any set value in memory.
• Check the user program for proper execution before actually running it
on the Unit. Not checking the program may result in an unexpected
operation.
• Precaution on Using Indirect DM and EM Addresses in Comparison
Instructions:
When indirect DM or EM addresses are used as operands in comparison
instructions, the top portion of the comparison instruction will be displayed
in yellow when it is being monitored. At that time the power flow will not be
monitored to the right of such comparison instructions. The contact and
coil status, and present values of operands in special instructions will be
displayed normally.
CX-Programmer – Operation Manual
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