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2 Instructions
CP1E CPU Unit Instructions Reference Manual(W483)
High-speed Counter/Pulse
Output Instructions
2
PLS2
Function
PLS2(887) starts pulse output on the port specified in P using the mode specified in M at the start fre-
quency specified in F (1 in diagram).
The frequency is increased every pulse control period (4 ms) at the acceleration rate specified in S until
the target frequency specified in S is reached (2 in diagram).
When the target frequency has been reached, acceleration is stopped and pulse output continues at a
constant speed (3 in diagram).
The deceleration point is calculated from the number of output pulses and deceleration rate set in S and
when that point is reached, the frequency is decreased every pulse control period (4 ms) at the deceler-
ation rate specified in S until the starting frequency specified in S is reached, at which point pulse out-
put is stopped (4 in diagram).
Pulse output is started each time PLS2(887) is executed. It is thus normally sufficient to use the differ-
entiated version (@PLS2(887)) of the instruction or an execution condition that is turned ON only for
one scan.
PLS2(887) can be used only for positioning.
With the CJ1M CPU Units, PLS2(887) can be executed during pulse output for ACC(888) in either inde-
pendent or continuous mode, and during acceleration, constant speed, or deceleration. (See notes 1
and 2.) ACC(888) can also be executed during pulse output for PLS2(887) during acceleration, con-
stant speed, or deceleration.
Note 1 Executing PLS2(887) during speed control with ACC(888) (continuous mode) with the same target fre-
quency as ACC(888) can be used to achieve interrupt feeding of a fixed distance. Acceleration will not be
performed by PLS2(887) for this application, but if the acceleration rate is set to 0, the Error Flag will turn
ON and PLS2(887) will not be executed. Always set the acceleration rate to a value other than 0.
2 If PLS2 (887) is executed during the period from pulse output stop to one cycle after the stop (when pulse
output in-progress flag is ON), pulse output will start again in the next cycle after stopping.
However, if pulse output is stopped by INI (880), the pulse output instruction will become invalid within one
cycle after the stop. Execute the instruction till the pulse output in-progress flag is OFF.
3 PLS2 instruction can be used only with transistor output type of CP1E N/NA-type CPU Unit.
In case of transistor output type of CP1E E-type CPU Unit or relay output type, NOP processing is applied.
Target frequency
Starting frequency
Time
PLS2(887) executed.
Pulse frequency