3 PARAMETERS FOR POSITIONING CONTROL
3.13 Parameter Block
223
3
Positioning speeds of acceleration patterns/deceleration patterns
There are patterns (below pattern 1 to 4 respectively) that depends on the positioning speed of the acceleration pattern/
deceleration pattern of advanced S-curve acceleration/deceleration.
The actual acceleration/deceleration time for each pattern (pattern (1) to (4)) based on positioning speed is shown below.
■
Actual acceleration time
Positioning
speed
Pattern Positioning
speed
Description
Actual acceleration time
Actual maximum
acceleration
High
Low
(1)
Positioning
speed = S.R.
It accelerates with the
acceleration section 1,
maximum acceleration section
and acceleration section 2.
AAT
AmaxA
(2)
Vacc <
Positioning
speed < S.R.
Maximum acceleration section
is short than pattern 1.
(3)
Positioning
speed = Vacc
• No maximum acceleration
section
• It accelerates with only
acceleration section 1 and
acceleration section 2.
A1T + A2T
(4)
Positioning
speed < Vacc
• No maximum acceleration
section
• Maximum acceleration and
acceleration increase/
decrease time of
acceleration section 1 and 2
are shortened.
Speed
A2R
A1R
S.R.
AmaxA
Vacc
Time
Acceleration
Time
(1)
(2)
(3)
(4)
(1)
(2)
(3)
(4)
Trapezoidal acceleration
/deceleration
Pattern (1): Positioning speed = S.R.
Pattern (2): Vacc < Positioning speed < S.R.
Pattern (3): Positioning speed = Vacc
Pattern (4): Positioning speed < Vacc
*: The graph of deceleration is opposite to
acceleration because the deceleration
pattern is negative acceleration.
AAT -
(S.R.-Positioning speed)
AmaxA
(A1T+A2T)
×
(Positioning speed/Vacc)
AmaxA
×
(Positioning speed/Vacc)
Summary of Contents for MELSEC iQ-R16MTCPU
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