763
3. Instructions
CS/CJ/NSJ Series Instructions Reference Manual (W474)
High-speed Counter/Pulse Output Instructions
3
PLS2
z Switching from Continuous Mode Speed Control to Independent Mode Positioning
z Stopping Operation for Reversal Specifications
Example application Frequency changes Description
Procedure/
instruction
Change from speed control to fixed
distance positioning during operation
PLS2(887) can be executed during a
speed control operation started with
ACC(888) to change to positioning
operation.
Note If a constant speed cannot be
maintained after changing the
settings, an error will occur and the
original operation will continue to
the original target position.
ACC(888)
(Continuous)
↓
PLS2(887)
Fixed distance feed interrupt
The stop method can be set to a deceleration stop or
an immediate stop when changing the specified
number of output pulses and reversing operation.
• When the stop operation for reversal specification
(bit 15 of M) is set to 0 to set a deceleration stop,
the direction will be changed using the specified
deceleration rate. (This is indicated by the dotted
line in the figure.)
• When the stop operation for reversal specification
(bit 15 of M) is set to 1 to set an immediate stop,
the direction will be changed after an immediate
stop. (This is indicated by the solid line in the
figure.)
• If the specified number of output pulses is less than
the number of pulses that has been moved, reverse
operation is performed.
Note On the CJ1M-CPU2@, only a deceleration stop can
be specified.
Pulse frequency
Target
frequency
Outputs the number of
pulses specified in
PLS2(887) (Both relative
and absolute pulse
specification can be used.)
Execution of
ACC(888)
(continuous
mode)
Execution of
PLS2(887)
Time
Pulse
frequency
Present
frequency
Execution of
ACC(888)
(continuous
mode)
Execution of PLS2(887)
with the following settings
• Number of pulses =
number of pulses until stop
• Relative pulse specification
• Target frequency = present
frequency
Time
Pulse frequency
Target
frequency
Specified number
of pulses
Changes direction after
decelerating to a stop.
Changes direction after
an immediate stop.
PLS2(887)
executed.
PLS2(887) executed.
Reverse operation is
performed when then
number of output pulses
is changed.
Time
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