Omron CJ2M-CPU Series - Page 251

8-91
8 Pulse Outputs
CJ2M CPU Unit Pulse I/O Module User’s Manual
8-11 Pulse Output Patterns
8
8-11-2 Positioning Control (Independent Mode)
Change
speed
smoothly
(with
unequal
accelera-
tion and
decelera-
tion rates)
Changing
the target
speed (fre-
quency)
during posi-
tioning (dif-
ferent
accelera-
tion and
decelera-
tion rates)
PLS2(887) can be
executed during
positioning to
change the accel-
eration rate, decel-
eration rate, and
target frequency.
To prevent the tar-
get position from
being changed
intentionally, either
operation must be
continued with
compensation val-
ues specified with
the ACC(888) or
PLS2(887) param-
eter change opera-
tion or the original
target position must
be specified as a
PLS2(887) operand
in absolute coordi-
nates.
PULS
↓
ACC (Inde-
pendent)
↓
PLS2
• Number of
pulses
• Relative or
absolute
pulse speci-
fication
•Port
•Pulse +
direction
• Accelera-
tion rate
• Decelera-
tion rate
• Target fre-
quency
• Starting fre-
quency
PLS2
↓
PLS2
Change
target
position
Change the
target posi-
tion during
positioning
(multiple
start func-
tion)
The PLS2(887)
instruction can be
executed during
positioning to
change the target
position (number of
pulses).
PULS
↓
ACC (Inde-
pendent)
↓
PLS2
• Number of
pulses
• Relative or
absolute
pulse speci-
fication
•Port
•Pulse +
direction
• Accelera-
tion rate
• Decelera-
tion rate
• Target fre-
quency
• Starting fre-
quency
PLS2
↓
PLS2
Operation
Example
application
Frequency changes Function
Procedure
Instructions Settings
Pulse frequency
New target frequency
Target frequency
ACC (independent
mode) executed
PLS2 executed to change the target frequency
and acceleration/deceleration rates.(The target
position is not changed. The original target
position is specified again.)
Time
Acceleration/
deceleration
rate
Specified number of pulses
(Specified with PULS.)
Pulse frequency
Target frequency
PLS2 instruction executed.
PLS2 executed to change the target position.
(The target frequency and
acceleration/deceleration rates are not changed.)
Time
Acceleration/
deceleration
rate
Specified
number of pulses
Number of pulses specified
with PULS changed.