Operating Modes And Operation - Omron CP1E CPU UNIT SOFTWARE User Manual

3 CPU Unit Operation
Changing the Operating Mode after Startup
Use one of the following procedures.
• Select PROGRAM, MONITOR, or RUN from the Startup Mode Menu.
• Right-click the PLC in the project tree, and then select PROGRAM, MONITOR, or RUN from the
Startup Mode Menu.

Operating Modes and Operation

The following table lists status and operations for each mode.
Ladder program execution
I/O refresh
External I/O status
I/O memory
CX-Program-
mer opera-
tions
The Retaining of I/O Memory When Changing the Operating Mode
Mode changes
RUN or MONITOR to
PROGRAM
PROGRAM to RUN or
MONITOR
RUN to MONITOR or
MONITOR to RUN
* The data is cleared when the IOM Hold Bit is OFF. The outputs from the Output Units will be turned OFF when a
fatal error is occurred, regardless of the status of the IOM Hold Bit, and the status of the output bits in CPU Unit's
I/O memory is retained.
Refer to Section 5 I/O Memory for details on the I/O memory.
3-4
Operating mode
Non-retained memory
Retained memory
I/O memory monitoring
Ladder program monitoring
Ladder pro- From CPU Unit
gram transfer
To CPU Unit
Checking programs
Setting the PLC Setup
Changing ladder programs
Forced-set/reset operations
Changing timer/counter SV
Changing timer/counter PV
Change I/O memory PV
Non-retained areas
• I/O bits
• Serial PLC Link Words
• Work bits
• Timer PV/Completion Flags
• Data Registers
(Auxiliary Area bits/words are retained or
not retained depending on the address.)
*
Cleared
*
Cleared
*
Retained
PROGRAM
Stopped Executed
Executed Executed
OFF after changing to Controlled by
PROGRAM mode but the ladder pro-
can be turned ON from grams.
the CX-Programmer
afterward.
Cleared Controlled by
the ladder pro-
Retained
grams.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
• Holding Area
• DM Area
• Counter PV and Completion Flags
(Auxiliary Area bits/words are
retained or not retained depending
on the address.)
Retained
Retained
Retained
CP1E CPU Unit Software User's Manual(W480)
MONITOR RUN
Executed
Executed
Controlled by
the ladder pro-
grams.
Controlled by
the ladder pro-
grams.
Yes Yes
Yes Yes
Yes Yes
No No
No No
No No
Yes No
Yes No
Yes No
Yes No
Yes No
Retained areas