5-49
5 Designing Tasks
NJ-series CPU Unit Software User’s Manual (W501)
5-2 Task System
5
5-2-18 Monitoring Task Execution Status and Task Execution Times
The parameters are listed in the following table.
*1 Entries are made on the Expanded number of I/O points for CJ-series Unit Dialog Box.
You can monitor the following items.
*1This is the actual time required from the point that task execution was started until it was completed. This
interval includes both the time to execute other tasks and the time for system services that were executed
from when task execution was started until it was completed.
*2This interval is the time required to execute only the task itself. It is the same as the task execution time for
the primary periodic task. For periodic tasks, this is the task execution time minus the time to execute
other tasks and the time for system services that were executed between the point that the execution con-
dition is met until execution is completed.
Port or Unit that is
used
Parameter Description Set values Default
CPU Unit Built-in Eth-
erNet/IP Port
Number of con-
nections
This is the number of tag data
link connections.
0 to 32 0
Minimum RPI This is the lowest packet interval
(RPI) that is set for all of the tag
data link connections.
1 ms to 10 s in
1-ms incre-
ments
---
CJ-series EtherNet/IP
Unit (CJ1W-EIP21)
*1
Number of tags This is the number of tags in the
tag data links.
0 to 256 0
Monitor item Description
Connected
to the Con-
troller
Connected
to the Sim-
ulator
Task execu-
tion time
*1
Min. The minimum value of the task execution time. Displayed. Not dis-
played.
Average The maximum value of the task execution time.
Displayed.
Max. The maximum value of the task execution time.
Set period The specified task period.
Period exceeded If the task execution time exceeds the task
period (i.e., if the Task Period Exceeded Flag
system-defined variable is TRUE), the amount
by which the time was exceeded is displayed in
the bar.
Task execution count Displays the number of executions of the task.
The value of the Task Execution Count system-
defined variable is displayed.
Real processing time of
tasks
*2
The time ratios are displayed with bars for the
system common processing, I/O refreshing,
user program execution, and motion control pro-
cessing. (Specific time values are not dis-
played.)
None Displayed.
Average esti-
mation
The estimated average value of the real pro-
cessing time of task is displayed.
Max estimation The estimated maximum value of the real pro-
cessing time of task is displayed.
Task period (fixed)
Task execution time (varies)
Real processing time of task (varies)
Real processing time of task (varies)
Control processingI/O refreshing
Output data
processing
Input data
processing
System common
processing 1
Refreshing
User program
execution
System common
processing 2
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