Cpu Unit Operating Modes; Operating Modes; Status And Operations In Each Operating Mode - Omron SYSMAC CS1D-PD Series Operation Manual

CPU Unit Operating Modes

Duplex Refreshing
9-2

CPU Unit Operating Modes

9-2-1

Operating Modes

9-2-2

Status and Operations in Each Operating Mode

Overall Operation
Mode Program
(See note)
PROGRAM Stopped
RUN Executed
MONITOR Executed
Programming Console Operations
Mode Monitor I/O
Memory
PROGRAM OK
MONITOR OK
RUN OK
350
Duplex operating status does not exist during duplex initialization (i.e., duplex
initialization is performed in simplex operating status). This means that the
active CPU Unit will not be switched. Because of this, operation will not con-
tinue if an error that would cause the CPU Unit to be switched occurs during
duplex initialization, including CPU errors, memory errors, fatal Inner Board
errors, program errors, exceeding the cycle time limit, and execution of FALS
instructions).
Duplex refreshing is used to transfer errors detected by the active CPU Unit or
the status of special flags and bits changed by the active CPU Unit to the
standby CPU Unit. It is performed only in Duplex Mode.
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 creat-
ing I/O tables, initializing the PLC Setup and other settings,
transferring programs, 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.
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 External outputs
Executed OFF
Executed Controlled by pro-
gram
Executed Controlled by pro-
gram
Monitor Transfer Program
Program
PLC to
Programming
Device
OK OK
OK OK
OK OK
I/O Memory
Non-holding
areas
Clear
Controlled by program
Controlled by program
Check
Program
Programming
Device to PLC
OK OK
X X
X X
Section 9-2
Holding areas
Hold
Create I/O
Table
OK
X
X