At a Glance

This field gives you access to the display and settings of the task periods and the various task execution commands.

Task checking field:

This field may be extended according to the tasks configured in the project: one line per auxiliary task may be displayed in addition to those in the above screen.

Description

The following table describes the role of each of the screen columns.

Column

Role

Programmed Period

Value of the configured task period (for a periodic task).

Adjusted Period

In periodic operation, enables the task period to be adjusted. This setting is lost on a cold start. The value entered in the configuration is then taken into account.

Red background color in a field of this column indicates an erroneous returned by the PLC.

It is possible to restore task periods configured for the selected task or for all the periodic tasks with the Services > Restore or Services > Restore all commands.

Minimum Duration

Minimum duration of execution of the task, measured from the last cold restart or reinitialization using the Init Duration command.

Current Duration

Duration of the last task cycle.

Maximum Duration

Maximum duration of execution of the task, measured from the last cold restart or reinitialization using the Init Duration command.

Watchdog

Value of the task watchdog. This value may not be modified.

Operating Mode

Operating mode of the task: RUN, STOP, HALT or BKPT (Breakpoint).

Cmd

The RUN/STOP buttons associated with the tasks are used to switch to RUN or STOP.

Status

  • E (enabled): for active task (the system bits %S30 and %S31 are set at 1),

  • D (disabled): for inactive task (the system bits %S30 and %S31 are set at 0).

Activation Task

The Enable/Disable buttons associated with the tasks are used to enable or disable a task.

When a task is enabled, the code is scanned and executed. The inputs/outputs are updated.

When a task is disabled, the code is neither scanned nor executed. The inputs/outputs are still updated.

Init Duration

This command is used to reinitialize the values of the maximum and minimum durations with the current value in order to carry out new measurements.

CPU Load

Only for M580 with SV >= 2.80: percentage of the CPU load used by the task.

In addition to the these values the system and total CPU load are given below the tasks checking field.

NOTE: To perform application transfer in good conditions from primary to standby CPU, it is recommended to not exceed 80% for the total CPU load.

Event Processing

The "Events" field is used to check the execution of event processing

The following table describes the role of each of the columns of the screen above.

Column

Role

Enable or disable all

This button is used to enable or disable all the event processing operations.

If the events appear when the processing operations are disabled, they are lost. The master task must be in RUN for this command to be authorized.

Status

indicates the status of the event processing operations: Enabled or Disabled.

Number

Number of event processing operations executed