8 Pulse Outputs
8-88
CJ2M CPU Unit Pulse I/O Module User’s Manual
* If ACC(888) started the operation, the original acceleration/deceleration rate will remain in effect.
If SPED(885) started the operation, the acceleration/deceleration rate will be invalid and the pulse output will stop immedi-
ately.
Change
speed
smoothly
Changing the
speed smoothly
during operation
Changes the
frequency
from the
present fre-
quency at a
fixed rate. The
frequency can
be acceler-
ated or decel-
erated.
ACC or
SPED (Con-
tinuous)
↓
ACC (Contin-
uous)
•Port
• Continuous
• Target frequency
• Acceleration/
deceleration rate
Changing the
speed in a
polyline curve
during operation
Changes the
acceleration or
deceleration
rate during
acceleration or
deceleration.
ACC (Contin-
uous)
↓
ACC (Contin-
uous)
•Port
• Continuous
• Target frequency
• Acceleration/
deceleration rate
Change
direction
Not supported.
Stopping Pulse Output
Operation
Example
application
Frequency changes Function
Procedure
Instructions Settings
Pulse out-
put stopped.
Immediate stop Stops the
pulse output
immediately.
SPED or
ACC (Contin-
uous)
↓
INI
•Port
• Pulse output
stop
Stopping
pulse output
Immediate stop Stops the
pulse output
immediately.
SPED or
ACC
(Continuous)
↓
SPED
(Continuous)
•Port
• Continuous
• Target
frequency=0
Stop pulse
output
smoothly
Decelerate to a
stop
Decelerates
the pulse out-
put to a stop.*
ACC (Contin-
uous)
↓
ACC (Contin-
uous)
•Port
• Continuous
• Target
frequency=0
Operation
Example
application
Frequency changes Function
Procedure
Instructions Settings
Pulse frequency
Target frequency
Present frequency
ACC instruction executed.
Time
Acceleration/
deceleration
rate
Pulse frequency
Target frequency
Present frequency
ACC instruction executed.
ACC instruction executed.
ACC instruction executed.
Time
Acceleration/
deceleration rate n
Acceleration rate 2
Acceleration
rate 1
Pulse frequency
Present
frequency
INI instruction executed
Time
Pulse frequency
Present
frequency
SPED instruction executed
Time
Pulse frequency
Present
frequency
ACC instruction executed.
Time
Target
frequency=0
Acceleration/
deceleration rate
(set when starting)
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