Parameter description
protocol
Performance
Menu
2
The
acceleration
rate
is
selected
as
follows.
such
that
ramp
rates
can
be
selected
by
external
control.
The
ramp
rate
selected
depends
on
the
binary
code
generated
by
these
bits
as
follows:
When
Pr
2.10
is
set
to
9
the
appropriate
acceleration
rate
is
automatically
selected
depending
on
the
value
of
Pr
1.50,
and
so
an
acceleration
rate
can
Parameter
structure
Keypad
and
format
Advanced
parameter
descriptions
Serial
comms
The
time
taken
in
seconds
for
the
ramp
output
to
change
by
speed
(
⊗
w*)
is
given
below.
Two
cases
are
given
because
the
total
ramp
time
must
be
calculated
with
a
different
equation
depending
on
whether
the
acceleration
is
able
to
reach
the
selected
ramp
rate
(A1)
or
not.
If
the
required
change
is
small
the
selected
ramp
rate
is
not
reached
and
the
ramp
does
not
include
the
central
linear
ramp
region.
If
the
required
change
is
larger
the
ramp
does
include
the
central
linear
region
as
shown
in
the
diagram
above.
Speed
⊗
w*
linear
=
1000
x
J
/
A1
2
where:
A
=
selected
ramp
rate
J
=
Pr
2.07
If
the
required
change
is
less
than
⊗
w*
linear
then
T
Ramp1
should
be
used,
but
if
the
speed
change
is
greater
or
equal
to
⊗
w*
linear
T
Ramp2
should
be
used.
T
Ramp1
=
2
(
⊗
w*
x
Pr
2.07
/
1000)
T
Ramp2
=
(
⊗
w*
x
A
/
1000)
+
(Pr
2.07
/
A)
The
default
values
for
the
ramp
rate
and
S
ramp
acceleration
limit
have
been
chosen
such
that
for
the
default
maximum
speed,
the
curved
parts
of
the
S
ramp
are
25
%
of
the
original
ramp
if
S
ramp
is
enabled.
Therefore
the
ramp
time
is
increased
by
a
factor
of
1.5.
0
Ramp
rate
selection
by
terminal
input
1-8
Ramp
rate
defined
by
parameter
number,
i.e.
1
=
Pr
2.11
{SE03,
0.24},
2
=
Pr
2.12,
etc.
9
Ramp
rate
selection
by
Pr
1.50
When
Pr
2.10
is
set
to
0
the
acceleration
ramp
rate
selected
depends
on
the
state
of
bit
Pr
2.32
to
Pr
2.34.
These
bits
are
for
control
by
digital
inputs
be
programmed
to
operate
with
each
reference.
Since
the
new
ramp
rate
is
selected
with
the
new
reference,
the
acceleration
applies
towards
the
selected
preset
if
the
motor
needs
to
accelerate
to
reach
the
preset.
Mentor
MP
Advanced
User
Guide
37
Issue
Number:
4
www.onxcontrol.com
2.10
Acceleration
rate
selector
Coding
Bit
SP
FI
DE
Txt
VM
DP
ND
RA
NC
NV
PT
US
RW
BU
PS
1
1
1
Range
0
to
9
Default
0
Update
rate
4
ms
read
Pr
2.34
Pr
2.33
Pr
2.32
Ramp
defined
by
0
0
0
Pr
2.11
{SE03,
0.24}
0
0
1
Pr
2.12
0
1
0
Pr
2.13
0
1
1
Pr
2.14
1
0
0
Pr
2.15
1
0
1
Pr
2.16
1
1
0
Pr
2.17
1
1
1
Pr
2.18