Operating Mode Changes And I/O Memory - Omron SYSMAC CS1D-PD Series Operation Manual

CPU Unit Operating Modes
Mode PLC
Setup
PROGRAM OK
RUN X
MONITOR X
Mode
PROGRAM Disabled status (INI)
RUN • 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
startup 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
MONITOR
right to execute.
• A status will go to standby (WAIT) status if a READY task is put into Standby
status by a TASK OFF (TKOF) instruction.
9-2-3

Operating Mode Changes and I/O Memory

Note
Modify Force- Changing timer/
program set/reset
OK OK OK
X X X
OK OK OK
Note The following table shows the relationship of operating modes to tasks.
Cyclic task status
Note Interrupt tasks are supported only by Single CPU Systems and cannot be
used in Duplex CPU Systems.
Mode Changes
RUN or MONITOR
to PROGRAM
PROGRAM to RUN
or MONITOR
RUN to MONITOR
or
MONITOR to RUN
1. The following processing is performed depending on the status of the I/O
Memory Hold Bit. Output from Output Units will be turned OFF when oper-
ation stops even if I/O bit status is held in the CPU Unit.
Changing timer/
counter SV counter PV
OK
X
OK
Non-holding areas
• I/O bits
• Data Link bits
• CPU Bus Unit bits
• Special I/O Unit bits
• Inner Board bits
• DeviceNet bits
• Work bits
• Timer PV/Completion
Flags
• Index Registers
• Data Registers
• Task Flags
(Auxiliary Area bits/words
are holding or non-holding
depending on the address.)
Cleared (See note 1.)
Cleared (See note 1.)
Held (See note 2.)
Section 9-2
Changing I/O Unit online
memory PV replacement
OK OK
X OK
OK OK
Interrupt task
status (See note.)
Stopped
Executed if inter-
rupt condition is
met.
Holding Areas
• HR Area
• DM Area
• EM Area
Counter PV and Completion
Flags
(Auxiliary Area bits/words are
holding or non-holding
depending on the address.)
Held
Held
Held
351