Cpu Module Operating Modes; Operating Modes; Status And Operation Under Different Operating Modes - Delta AS Series Operation Manual

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11.2 CPU Module Operating Modes

11.2.1

Operating Modes

There are two operating modes. They can be used to control a user program and all tasks.
STOP mode: A program is not executed in this mode. Users can download a module table, initialize CPU
configuration and other setting, download a program, check a program, and force a bit ON/OFF.
RUN mode: A program is executed in this mode. Users can NOT download a module table, and initialize CPU
configuration and other setting.
11.2.2

Status and Operation under Different Operating Modes

The following table lists the status and operation states for RUN and STOP modes.
Basic operation

CPU
mode
The execution
STOP of the program
stops.
The program
RUN
executes.
Relationship between the operating modes and tasks

Mode
STOP
RUN
I/O
Program
refreshing
I/O refreshing
executes.
I/O refreshing
executes.
Loop task
Execution of a loop tasks stops.
 The tasks that have not been executed are in the
HALT state.
 If a task is active, or the instruction TKON is
executed, the task executes.
 If a task is not active, or the instruction TKOFF
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External output
OFF. If you set the I/O
module so that the final
state of the external output
on the I/O module is
retained, the final state of
the external output on the
I/O module is retained.
The program controls the
external output.
Execution of an interrupt task
stops.
If the condition of the interrupt is
met, the interrupt task executes.
Program memory
Non-latched Latched
area area
The data in the program
memories is retained.
The program controls the
program memories.
Interrupt task