Cpu Unit Memory Map - Omron SYSMAC CS1D-PD Series Operation Manual

CPU Units
Note
2-4-3

CPU Unit Memory Map

64
1. When pin 1 is set to ON, writing is prohibited for the user program and all
parameter data (PLC Setup, I/O table registration, etc.). Moreover, it is not
possible to clear the user program or parameters even by executing a
memory clear operation from a Programming Device.
2. In a Duplex CPU System, automatic transfer at startup can be executed
only from the active CPU Unit. Duplex initialization is performed between
the two CPU Units after the automatic transfer, and the user program, pa-
rameters, and I/O memory are matched. If pin 2 it set to ON, I/O memory
(AUTOEXEC.IOM, ATEXEC@@.IOM) will also be transferred automatical-
ly. (Refer to the Programming Manual.) The program (AUTOEXEC.OBJ)
and Parameter Area (AUTOEXEC.STD) must both be on the Memory
Card, but the I/O memory (AUTOEXEC.IOM, ATEXEC@@.IOM,
AUTOEM@@.IOM) does not need to be.
3. Simple Backup Operations
In Duplex Mode, the simple backup function can be executed only from the
active CPU Unit. Duplex initialization is not executed between the two CPU
Units after simple backup is performed. Therefore, after the data has been
read to the CPU Unit, turn the power OFF and back ON and then press the
Initial Switch on the Duplex Unit. If DIP switch pin 7 on the active CPU Unit
is ON, a duplex verification error will occur.
Pin 7 of DIP
switch on CPU
Unit
ON
OFF (default)
Note After the simple backup operation has been used to read data from
the Memory Card to the CPU Unit, the operating mode will remain
in PROGRAM mode and cannot be changed to MONITOR or RUN
mode until the PLC power is turned OFF.
After reading the data to the PLC with the simple backup operation,
turn OFF the power, turn OFF DIP switch pin 7, and then turn the
power back ON.
The memory of CS1D CPU Units is configured in the following blocks.
• I/O Memory: The data areas accessible from the user program
• User Memory: The user program and Parameter Area (See note 1.)
The above memory is backed up using a CS1W-BAT01 Battery. If the battery
voltage is low, the data in these areas will not be stable.
The CPU Unit has a built-in flash memory, however, to which the user pro-
gram and Parameter Area data is backed up whenever the user memory is
written to, including data transfers and online editing from a Programming
Device (CX-Programmer or Programming Console, data transfers from a
Simple backup operation
Writing from active CPU Unit
to Memory Card
Reading from Memory Card
to active CPU Unit
Comparison of Memory
Card and CPU Unit
Section 2-4
Procedure
Hold down the Memory
Card Power Supply Switch
for three seconds.
Turn PLC power OFF and
then back ON.
This setting is given priority
over automatic transfer at
startup (pin 2 ON).
Hold down the Memory
Card Power Supply Switch
for three seconds.