Application Precautions - Omron SYSMAC CS Series Operation Manual

Application Precautions

Caution
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4 Application Precautions
Caution
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When downloading a sequence table for the LCBjj (version 1.5 or higher) that
has been edited online with the CX-Process Tool version 3.2 or higher, confirm
that the system will operate normally with the edited sequence. If the sequence
is not suitable for operation, unexpected operation may result.
Confirm in advance the conditions at any node for which the sequence table is
being edited over a Controller Link or Ethernet network. Not doing so may result
in unexpected operation.
Observe the following precautions when using CX-Process Tool and Loop Con-
troller.
If the power supply is turned OFF while function block data is being backed up
from RAM to flash memory, the backup will not be completed normally. If the
power supply is turned back ON within 24 hours, however, the super capacitor
will have held the RAM data. The backup operation will restart when power is
turned ON and operation will start when the backup has been completed. If the
power supply is turned OFF for more than 24 hours, however, RAM data will be
lost and operation will be started with the data that was previously saved to flash
memory. If this happens, the Cold Start Auto-execution Flag (A35807) will turn
ON to show that the previous data has been used. Use this bit in programming to
take whatever steps are necessary, such as downloading the most recent func-
tion block data. (For LCBjj only)
Loop Control Unit data is monitored and operated using CX-Process Monitor
based on the monitor tag files created using CX-Process Tool. CX-Process Tool
can be used on Microsoft Windows 95, 98, Me, 2000, XP, or NT (Service Pack 4
or later). When creating monitor tag files using CX-Process Tool, CX-Process
Monitor must be installed on the same computer.
Before using function block data in actual operation, confirm operation by moni-
toring run status (to check the load rate; select Execute/Operation/Monitor
Run Status) and validating actions (select Validate Action/Start) with CX-Pro-
cess Tool. In particular, be sure to confirm that the load rate will be less than 60%.
(For details on the load rate, refer to the Operation Manual for the Loop Control-
ler.)
When uploading the Loop Controller's function block data, observe the following
precautions.
When performing Upload New for Loop Control Units of version 1.5 or earlier,
data on the Edit Block Diagram Screen (function block information) will be lost,
and the block diagram showing the connections between function blocks will not
be displayed.
When performing Upload Previous, if the data in the source file currently
opened using the CX-Process Tool and the Loop Controller's function block data
does not match the registered function blocks or the data on the Edit Block Dia-
gram Screen, the data currently opened may change to illegal data.
The Loop Controller can read and write I/O memory in the CPU Unit using the
Field Terminal Function Blocks or CPU Terminal Blocks independent of the user
program (Step Ladder Program) in the CPU Unit. Do not write to the same I/O
memory words from both the Loop Controller and the CPU Unit.
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