5 Understanding Programming
5-14
CJ2 CPU Unit Software User’s Manual
z Downloading and Uploading Individual Tasks
Individual program tasks can be uploaded and downloaded from the CX-Programmer.
z Restrictions to Function Block Use
Individual tasks cannot be downloaded for programs containing function blocks (uploading is possi-
ble).
z Restrictions to Using SFC Programs and ST Programs
Tasks to which SFC programs or ST programs are assigned cannot be uploaded or downloaded
individually.
Cyclic tasks are executed once per cycle in order starting with the lowest task number. Up to 128 tasks
can be used (cyclic task numbers 0 to 127). The tasks can be started by setting the Activated at the
start of operation Property using the CX-Programmer or by using Task Control Instructions. For infor-
mation on Task Control Instructions, refer to A-2 Instruction Execution Times and Number of Steps. If
extra cyclic tasks are used, a maximum of 384 cyclic tasks can be used.
Precautions for Correct UsePrecautions for Correct Use
Do not use the Task Control Instructions (TKON(820) and TKOFF(821)) to control tasks contain-
ing SFC programs. Otherwise they will not execute normally.
5-2-2 Cyclic Tasks
Cyclic Tasks
END
END
END
CX-Programmer
Individual tasks (programs)
Download individual tasks (programs).
CJ-series
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