Status And Operations In Each Operating Mode - Omron CJ - 09-2009 Operation Manual

CPU Unit Operating Modes

10-2-2 Status and Operations in Each Operating Mode

Overall Operation
Mode Program
(See note)
PROGRAM Stopped
MONITOR Executed
RUN Executed
Programming Console Operations
Mode Monitor I/O
Memory
PROGRAM OK
MONITOR OK
RUN OK
Mode PLC Setup
PROGRAM OK
MONITOR X
RUN X
Mode
PROGRAM Disabled status (INI)
MONITOR • Any task that has not yet been executed, will be in disabled status (INI).
• A task will go to READY status if the task is set to go to READY status at star-
tup or the TASK ON (TKON) instruction has been executed for it.
• A task in READY status will be executed (RUN status) when it obtains the
RUN
right to execute.
• A status will go to Standby status if a READY task is put into Standby status
by a TASK OFF (TKOF) instruction.
450
PROGRAM, RUN, and MONITOR are the three operating modes available in
the CPU Unit. The following lists status and operations for each mode.
I/O refresh
Executed
Executed
Executed
Monitor
Program
Programming
OK OK
OK OK
OK OK
Modify
Program
OK OK
OK OK
X X
Note The following table shows the relationship of operating modes to tasks.
Cyclic task status
External outputs
OFF
Controlled by pro-
gram
Controlled by pro-
gram
Transfer Program
PLC to Programming
Device to PLC
Device
OK
X
X
Force- set/ Changing
reset Timer/Counter
SV
OK
OK
X
Section 10-2
I/O Memory
Non-holding Holding areas
areas
Clear Hold
Controlled by program
Controlled by program
Check Create I/O
Program
OK OK
X X
X X
Changing Changing I/O
Timer/Counter Memory PV
PV
OK OK
OK OK
X X
Interrupt task
status
Stopped
Executed if inter-
rupt condition is
met.
Table