IN
Rel1.Active_1
Rel1.Done_1
Rel1.Busy_1
G0
Rel1.Execute
Positioning starts when
Execute changes to TRUE.
Positioning is complete
d when Execute changes
to FALSE, so Rel.Done_1 changes to TRUE for
one
period.
Precautions for Correct Use
Execute-type motion control instructions are executed when G0 changes to TRUE. It is not rec-
ommended to use them in the master control region.
If they must be used, be careful of the operation.
Additional Information
The function of the MC (Master Control Start) instruction is disabled in ST. All instructions in ST
are executed normally
.
For details on the MC and MCR instructions, refer to the NY-series Instructions Reference
Manual (Cat. No. W560).
Motion Control Instructions in ST Structure Instructions
This section describes the operation of motion control instructions when they are located in ST struc-
tures, such as IF
, CASE, WHILE, or REPEAT structures.
When the evaluation result for the condition expression of an ST structure instruction is FALSE, the
motion control instructions within the structure are not executed. Also, the values of the output varia-
bles are not updated.
If execution of an execute-type instruction is started and then the evaluation result changes to FALSE,
processing is continued until it is completed. In that case, however, the values of the output variables
are not updated.
Precautions for Correct Use
The execution status of an execute-type instruction in an ST structure will not be clear if the
evaluation result of the condition expression changes to F
ALSE during execution of the instruc-
tion. We therefore do not recommend using execution-type instructions in ST structures.
If they must be used, be careful of the operation.
1 Introduction to Motion Control Instructions
1-12
NY-series Motion Control Instructions Reference Manual (W561)
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