Omron CX-Process Monitor Plus 2, Operation Manual

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Application Precautions 4
!Caution
After updating the tag settings or network configuration for CX-Process Moni-
tor Plus, always confirm that the Monitor Plus screens will operate properly
with the new settings or configuration before attempting actual operation. If
the settings or configuration is not appropriate, unexpected operation may
result.
4 Application Precautions
Observe the following precautions when using CX-Process Monitor Plus.
!Caution Loop Control Unit/Board data is monitored and operated using CX-Process
Monitor Plus based on the tag files for Monitor Plus created using CX-Process
Tool. CX-Process Tool can be used on Microsoft Windows 95, 98, Me, 2000,
or NT (Service Pack 4 or later). CX-Process Tool Ver. 3.2 or higher must be
used to output tag files for the CX-Process Monitor Plus.
!Caution Before using function block data in actual operation, confirm operation by
monitoring run status (to check the load rate; select
Execute/Operation/Mon-
itor Run Status ) and validating actions (select Validate Action/Start ) with
CX-Process 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
Loop Control Unit/
Board Operation Manual .)
!Caution The Loop Control Unit/Board can read and write I/O memory in the CPU Unit
using the Field Terminal Function Blocks or CPU Terminal Blocks indepen-
dent 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 Control Unit/Board and the
CPU Unit.
!Caution
To hold an analog output or contact output at a specific value (for example, the
maximum value or minimum value) when the Loop Control Unit/Board stops
running, create a Step Ladder Program in the CPU Unit so that the corre-
sponding output bit allocated to Analog Output Unit or Contact Output Unit is
set to the desired value using an NC condition of the Loop Control Unit/Board
Running Flag (bit 00 in allocated CIO word “n”) as an input condition.
!Caution If a fatal error occurs in the CPU Unit (including fatal errors created by execu-
tion of an FALS instruction), the Loop Control Unit/Board will also stop run-
ning. To hold analog outputs to the previous values before the stop occurred,
and to set analog outputs to either the minimum value or maximum value, use
the output hold function of the Analog Output Unit or Analog I/O Unit.
!Caution Before turning ON the power to the PC, make sure that the facilities are safe.
The analog output values and contact outputs from the Loop Control Unit/
Board are updated when the power to the PC is turned ON regardless of the
operating mode of the CPU Unit (including in the PROGRAM mode). (Inter-
nally, the analog output values and contact outputs are sent from the CPU
Unit to Basic I/O Units and Analog Output Units.)
!Caution
Fail-safe measures must be taken by the customer to ensure safety in the
event of incorrect, missing, or abnormal signals caused by broken signal lines,
momentary power interruptions, or other causes.