Omron CJ - INSTRUCTIONS REFERENCE MANUAL 07-2009 Reference Manual page 34

CS/CJ/NSJ Series Instructions Reference Manual (W474)
• Before replacing the battery, turn ON power for at least 5 minutes before
starting the replacement procedure and complete replacing the battery
within 5 minutes of turning OFF the power supply. Memory contents may
be corrupted if this precaution is not obeyed.
• If the Battery Error Flag is used in programming the application, confirm
system safety even if the system detects a battery error before you
replace the battery while the power is ON.
• Do not short the battery terminals or charge, disassemble, heat, or incin-
erate the battery. Do not subject the battery to strong shocks. Doing any
of these may result in leakage, rupture, heat generation, or ignition of the
battery. Dispose of any battery that has been dropped on the floor or oth-
erwise subjected to excessive shock. Batteries that have been subjected
to shock may leak if they are used.
• UL standards require that only an experienced engineer can
replace the battery. Make sure that an experienced engineer
is in charge of battery replacement. Follow the procedure for
battery replacement given in this manual.
• Unexpected operation may result if inappropriate data link
tables or parameters are set. Even if appropriate data link tables and
parameters have been set, confirm that the controlled system will not be
adversely affected before starting or stopping data links.
• CPU Bus Units will be restarted when routing tables are transferred from
a Programming Device to the CPU Unit. Restarting these Units is required
to read and enable the new routing tables. Confirm that the system will
not be adversely affected before allowing the CPU Bus Units to be reset.
• 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
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.
• A battery is mounted to a CJ-series CPU Unit when the Unit is shipped
from the factory. Also, the time is set on the internal clock. It is thus not
necessary to clear memory and set the clock before using a CJ-series
CPU Unit. This point differs from the CS-series CS1 CPU Units.
• The user program and parameter area data in the CJ2 CPU Units are
backed up in the built-in flash memory. The BKUP indicator will light on
the front of the CPU Unit when the backup operation is in progress. Do
not turn OFF the power supply to the CPU Unit when the BKUP indicator
is lit. The data will not be backed up if power is turned OFF.
• Check the user program and Unit parameter settings for proper execution
before actually running them on the Unit. Not checking the program and
parameter settings may result in an unexpected operation.
• When setting a Special I/O Unit or CPU Bus Unit in the I/O tables, care-
fully check the safety of the devices at the connection target before
restarting the Unit.
• A CS1 or CJ1 CPU Unit program file (.OBJ) cannot be transferred directly
to a CJ2 CPU Unit using a Memory Card. It must first be converted for use
with a CJ2 CPU Unit using the CX-Programmer.
PRECAUTIONS
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