Omron CJ - REFERENCE MANUAL 02-2010 Reference Manual page 786

3. Instructions
Function
PLS2(887) starts pulse output on the port specified in P using the mode specified in M at the start
frequency 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
deceleration rate specified in S until the starting frequency specified in S is reached, at which point
pulse output is stopped (4 in diagram).
Pulse output is started each time PLS2(887) is executed. It is thus normally sufficient to use the
differentiated version (@PLS2(887)) of the instruction or an execution condition that is turned ON only
for one scan.
Pulse frequency
Target frequency
Starting frequency
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
independent 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,
constant 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 ACC(888) is executed in independent or continuous mode with a target frequency of 0 Hz and then
ACC(888) or PLS2(887) is executed before pulse output stops, the target frequency will not change and
pulse output will stop. Execute ACC(888) or PLS2(887) after pulse output stops.
750
PLS2(887) executed.
Time
CS/CJ/NSJ Series Instructions Reference Manual (W474)