3 CPU Unit Operation
3-4
CP2E CPU Unit Software User’s Manual(W614)
z 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.
The following table lists status and operations for each mode.
* The data is cleared when the IOM Hold Bit is OFF. The outputs of 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.
Operating Modes and Operation
Operating mode PROGRAM MONITOR RUN
Ladder program execution Stopped Executed Executed
I/O refresh Executed Executed Executed
External I/O status OFF after changing to
PROGRAM mode but
can be turned ON from
the CX-Programmer
afterward.
Controlled by
the ladder pro-
grams.
Controlled by
the ladder pro-
grams.
I/O memory Non-retained memory Cleared Controlled by
the ladder pro-
grams.
Controlled by
the ladder pro-
grams.
Retained memory Retained
CX-Program-
mer opera-
tions
I/O memory monitoring Yes Yes Yes
Ladder program monitoring Yes Yes Yes
Ladder pro-
gram transfer
From CPU Unit Yes Yes Yes
To CPU Unit Yes No No
Checking programs Yes No No
Setting the PLC Setup Yes No No
Changing ladder programs Yes Yes No
Forced-set/reset operations Yes Yes No
Changing timer/counter PV Yes Yes No
Change I/O memory PV Yes Yes No
The Retaining of I/O Memory When Changing the Operating Mode
Mode changes
Non-retained areas Retained areas
• I/O bits
• Serial PLC Link Words
• Work bits
• Timer PV/Completion Flags
• Index Registers
• Data Registers
(Auxiliary Area bits/words are retained or
not retained depending on the address.)
• Holding Area
• DM Area
• Counter PV and Completion Flags
(Auxiliary Area bits/words are
retained or not retained depending
on the address.)
RUN or MONITOR to
PROGRAM
Cleared
*
Retained
PROGRAM to RUN or
MONITOR
Cleared
*
Retained
RUN to MONITOR or
MONITOR to RUN
Retained
Retained
To Next Page
Loading...
Need help?
General
