Cpu Unit Operating Modes; Operating Modes; Status And Operations In Each Operating Mode - Omron CP1L 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)
Note When the mode is changed between PROGRAMMING mode and
RUN or MONITOR mode, forced status initialization is according to
the status of the Forced Status Hold Bit at that time.
(3) User program recovery is performed if online editing is performed but the
power supply to the PLC is turned OFF before the CPU Unit can complete
backup processing. The BKUP indicator will light during backup process-
ing.
The CPU Unit has three operating modes that control the entire user program
and are common to all tasks.
PROGRAM:
MONITOR:
RUN:
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
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.
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.
Programs are executed and some operations are disabled.
Executed
Executed
According to program
According to program
OK
OK
OK
X
X
X
X
X
X
X
X
RUN mode MONITOR mode
Executed
Executed
According to program
According to program
OK
OK
OK
X
X
X
OK
OK
OK
OK
OK
Stopped
Section 2-5
Interrupt task
status
85