The CPU Unit with unit version 1.08 or later and Sysmac Studio version 1.09 or higher are
required to use the Initial Status setting for programs at the start of operation, the PrgStart
instruction and the PrgStop instruction.
From 0 to 128 programs can be assigned to one task.
You can assign only program POUs. You cannot assign function block instances or functions directly
to tasks. You cannot assign the same program to more than one task.
The parameters for primary periodic task and periodic tasks are given below.
Parameters for Primary Periodic Tasks
*1 The process data communications cycle in the EtherCAT settings will be the same as this period.
*2 With the NJ301-, you can use this setting with unit version 1.03 or later.
POUs That You Can Assign to Tasks
5-2-12 Parameters for Primary Periodic Task and Periodic Tasks
Parameter Setting range Default
Update
timing
Changes
in RUN
mode
Task Type Specify the primary periodic task. --- When
trans-
ferred to
CPU Unit
Not
allowed.
Execution priority Always 4. ---
Task Name Text string Primary-
Ta sk
Period/
Execu-
tion Con-
ditions
Task period
*1
500 s
*2
, 1 ms, 2 ms, or 4 ms
1 ms
Task Period Exceeded Detec-
tion
Specify whether to detect an error if
the task execution time exceeds the
specified task period.
• Detect (a minor fault level Controller
error is generated).
• Do not detect (an observation is
recorded in event log).
Refer to Task Period Exceeded Error
on page 5-45 for details.
Detect.
Task Timeout Detection Time Set the time to detect timeouts if task
execution does not end, e.g., if there is
an infinite loop. Set a multiple of the
task period.
1 to 5
Refer to Task Execution Timeout Error
on page 5-46 for details.
5
Variable Access Time [%] Set the percentage of the task period
to assign to variable access.
1% to 50%
Refer to Settings for Variable Access
Time on page 5-40 for details.
3%
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