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MELSEC-A
9 MAIN POSITIONING CONTROL
9.2.8 Speed control
In "speed control"(" Da.2 Control method" = Forward run: speed control, Reverse
run: speed control), control is carried out in the axis direction in which the positioning
data has been set by continuously outputting the speed set in "
Da.7 Command
speed" until the input of a stop command.
The two types of speed control are "Forward run: speed control" in which the control
starts in the forward run direction, and "Reverse run: speed control" in which control
starts in the reverse run direction.
Operation chart
The following chart shows the operation timing for speed control. The "in speed
control flag" (
Md.40 Status: b0) is turned ON during speed control.
t
V
BUSY signal
OFF
ON
Positioning start signal
OFF
ON
Positioning complete signal
OFF
Stop command
OFF
ON
Does not turn ON even
when control is stoppe
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