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MELSEC-Q
12 CONTROL SUB FUNCTIONS
12.3.4 Output timing selection of near pass control
The function "output timing selection of near pass control" allows the user to select the
timing to output the difference (
) between the actual and the set positioning end
addresses in continuous path control, in which the difference (
) is output during the
execution of the next positioning data.
The details shown below explain about the function "output timing selection of near
pass control".
[1] Control details
[2] Control precautions
[3] Setting method
[1] Control details
There are two options for an output timing of near pass control: "At constant
speed" and "At deceleration".
• At constant speed: The distance
is output when the next positioning data
is executed in constant speed.
• At deceleration: The distance
is output when the next positioning speed
decelerates from V1 to V2.
When "At constant speed" is selected in a condition where the specified speed of
positioning data No.1 and No.2 in the figure 12.13 are "V1 > V2", the distance
is output when the next positioning data is executed in constant speed;
therefore, the positioning execution time is extended.
When "At deceleration" is selected, the positioning execution time is not
extended and remains the same as it was set.
The following drawing shows the operation of the function "output timing
selection of near pass control".
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