Omron CS1G/H-CPUxxH Instructions Manual page 815

High-speed Counter/Pulse Output Instructions
Example application
Change from speed
control to fixed distance
positioning during oper-
ation
Fixed distance feed
interrupt
794
Note Triangular Control
If the specified number of pulses is less than the number required to reach the
target frequency and return to zero, the function will automatically reduce the
acceleration/deceleration time and perform triangular control (acceleration
and deceleration only.) An error will not occur.
Pulse frequency
Target
frequency
Execution of
PLS2(887)
Switching from Continuous Mode Speed Control to Independent Mode
Positioning
Frequency changes
Pulse frequency
Target
frequency
Execution of
SPED(885)
Pulse
frequency
Present
frequency
Execution of
ACC(888)
(continuous
mode)
Specified number
of pulses
(Specified with
PLS2(887).)
Time
Outputs the number of
pulses specified in
PLS2(887) (Both relative
and absolute pulse
specification can be used.)
Time
Execution of
PLS2(887)
Time
Execution of PLS2(887)
with the following settings
• Number of pulses = num-
ber of pulses until stop
• Relative pulse specification
• Target frequency = present
frequency
• Acceleration rate = 0
• Deceleration rate = target
deceleration rate
Section 3-21
Description Procedure/
instruction
PLS2(887) can be exe- ACC(888)
cuted during a speed (Continu-
control operation started ous)
with ACC(888) to ↓
change to positioning
PLS2(887)
operation.