147
Built-in Outputs Section 6-2
Pulse Output Patterns
The following tables show the kinds of pulse output operations that can be
performed by combining various pulse output instructions.
Continuous Mode (Speed
Control)
Starting a Pulse Output
Changing Settings
Operation Example
application
Frequency changes Description Procedure
Instruction Settings
Output with
specified
speed
Changing the
speed (frequency)
in one step
Outputs pulses at a
specified frequency.
SPED(885)
(Continuous)
•Port
“CW/
CCW” or
“Pulse +
direction”
•Continu-
ous
•Target fre-
quency
Output with
specified
acceleration
and speed
Accelerating the
speed (frequency)
at a fixed rate
Outputs pulses and
changes the fre-
quency at a fixed
rate.
ACC(888)
(Continuous)
•·Port
•“CW/
CCW” or
“Pulse +
direction”
•Continu-
ous
•Accelera-
tion/decel-
eration
rate
•Target fre-
quency
Pulse frequency
Target frequency
Execution of SPED(885)
Time
Pulse frequency
Target frequency
Acceleration/
deceleration
rate
Execution of
ACC(888)
Time
Operation Example applica-
tion
Frequency changes Description Procedure
Instruction Settings
Change
speed in
one step
Changing the
speed during oper-
ation
Changes the fre-
quency (higher or
lower) of the pulse
output in one step.
SPED(885)
(Continu-
ous)
↓
SPED(885)
(Continu-
ous)
•Port
•Continu-
ous
•Target fre-
quency
Change
speed
smoothly
Changing the
speed smoothly
during operation
Changes the fre-
quency from the
present frequency
at a fixed rate. The
frequency can be
accelerated or
decelerated.
ACC(888) or
SPED(885)
(Continu-
ous)
↓
ACC(888)
(Continu-
ous)
•Port
•Continu-
ous
•Target fre-
quency
•Accelera-
tion/decel-
eration
rate
Changing the
speed in a polyline
curve during opera-
tion
Changes the accel-
eration or decelera-
tion rate during
acceleration or
deceleration.
ACC(888)
(Continu-
ous)
↓
ACC(888)
(Continu-
ous)
•Port
•Continu-
ous
•Target fre-
quency
•Accelera-
tion/decel-
eration
rate
Pulse frequency
Target frequency
Present frequency
Execution of
SPED(885)
Time
Pulse frequency
Target frequency
Present frequency
Acceleration/
deceleration
rate
Execution of
ACC(888)
Time
Pulse frequency
Target frequency
Present frequency
Acceleration rate n
Acceleration
rate 2
Acceleration
rate 1
Execution of ACC(888)
Execution of ACC(888)
Execution of ACC(888)
Time
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