Cpu Unit Operating Modes; Operating Modes; Status And Operations In Each Operating Mode - Omron CP1H-X40D Operation Manual

CPU Unit Operating Modes

2-5

CPU Unit Operating Modes

2-5-1

Operating Modes

2-5-2

Status and Operations in Each Operating Mode

Operation
Program execution
I/O refreshing
External I/O status
I/O memory Non-holding memory
Holding memory
CX-Programmer I/O memory monitoring
operations
Program monitoring
Program
transfers
Checking program
Setting PLC Setup
Changing program
Force-setting/resetting
Changing timer/counter SV OK
Changing timer/counter PV OK
Change I/O memory PV
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 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
MONITOR
right to execute.
• A status will go to Standby status (WAIT) if a READY task is put into Standby
status by a TASK OFF (TKOF) instruction.
The CPU Unit has three operating modes that control the entire user program
and are common to all tasks.
PROGRAM: Programs are not executed and preparations, such as initial-
izing the PLC Setup and other settings, transferring pro-
grams, checking programs, force-setting and force-resetting
can be executed prior to program execution.
MONITOR: Programs are executed, but some operations, such as online
editing, forced-set/reset, and changes to present values in I/O
memory, are enabled for trial operation and other adjust-
ments.
RUN: Programs are executed and some operations are disabled.
The following table lists status and operations for each mode.
PROGRAM mode
Stopped
Executed
OFF
Cleared
Held
OK
OK
From CPU Unit OK
To CPU Unit OK
OK
OK
OK
OK
OK
Note The following table shows the relationship of operating modes to tasks.
Cyclic task status
RUN mode
Executed Executed
Executed Executed
According to program According to program
According to program According to program
OK OK
OK OK
OK OK
X X
X X
X X
X OK
X OK
X OK
X OK
X OK
Section 2-5
MONITOR mode
Interrupt task
status
Stopped
Executed if inter-
rupt condition is
met.
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