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Description of Operation Section 3-2
• CX-Process Tool software version 3.1 or higher and CS1W-LCB01/05
version 1.2 or later or a Process-control CPU Unit (CS1D-CPU@@P)
• CX-Process Tool software version 4.0 or higher and a Loop-control
CPU Unit (CS1G-CPU@@P)
• Data can be backed up during operation using ITEM 125 (Backup start
command while running) of the System Common Block (Block Model
000) with a Loop-control CPU Unit (CJ1G-CPU@@P) of version 3.5 or
later and Loop Control Board (CS1W-LCB@@) or version 3.5 or later.
Backup during operation may, however, take up to 10 minutes to be com-
pleted. (Backup while operation is stopped takes up to approximately 10
seconds.)
4. If there is a power interruption while backing up during operation, the sys-
tem will automatically retry backup after power is restored. In such cases,
backup will be re-executed with Loop Controller operation stopped (and
the CPU Unit also stopped for Process-control CPU Units (CS1D-
CPU@@P). With Process-control CPU Units, however, backup will be au-
tomatically performed only for the active Loop Controller and when backup
has been completed, a DPL verification error will occur. Check that the
RDY LED for the standby Loop Controller is lit (i.e., that the standby Loop
Controller is ready) and press the Duplex Unit's initialization switch to exe-
cute duplex initialization.
5. If duplex operation is used with Process-control CPU Units (CS1D-
CPU@@P) and data in LCB element units is downloaded during operation,
operation data will be backed up in the flash memory of only the active
Loop Controller. The operation of the Loop Controllers will stop at this time.
If the power supply is turned OFF before starting operation with either a hot
or cold start, the data will exist only in the flash memory of the active Board,
so a duplex verification error will occur. If this occurs, check the RDY indi-
cator on the standby Loop Controller on the Process-control CPU Unit to
make sure that it is ready to operate and then press the initialization switch
on the Duplex Unit to initialize duplex operation.
6. Only function block (not including blocks common to the system) ITEMS
can be changed when data is backed up during operation. The following
operations cannot be performed by other Loop Controllers.
Batch setting the operating order
Batch setting the operation cycle -> download
Editing ladder diagrams
Downloading user link tables
Writing passwords
Downloading function block
Deleting stored blocks
Downloading block wiring diagrams
All clear
Batch downloading
Recovery
Flash memory to RAM
recovery operation
The Loop Controller will transfer (recover) the function block data from flash
memory to RAM in the following cases:
• Execution - Recovery is executed from the CX-Process Tool.
• The Loop Controller performs a cold start.
• A cold start will be performed automatically because the contents of RAM
were invalid (including lost data) when the power was turned ON.
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