Menu
11
Parameter
Parameter description
protocol
Performance
Used
in
all
comms
modes
to
define
the
baud
rate.
*Modbus
RTU
only
There
will
always
be
a
finite
delay
between
the
end
of
a
message
from
the
host
(master)
and
the
time
at
which
the
host
is
ready
to
receive
the
structure
Keypad
and
format
Advanced
parameter
descriptions
Serial
comms
The
protocol
provides
the
following
facilities:
•
Drive
parameter
access
with
basic
Modbus
RTU
•
Drive
parameter
access
via
CMP
extensions
•
Solutions
Module
internal
parameter
access
via
CMP
extensions
•
Access
via
a
Solutions
Module
onto
a
network
via
CMP
extensions
(see
specific
Solutions
Module
specifications
for
details)
•
Drive
parameter
database
upload
via
CMP
extensions
•
Drive
Onboard
Application
Lite
Ladder
program
upload/download
via
CMP
extensions
•
The
protocol
supports
access
to
32
bit
floating
point
parameters
The
following
product
specific
limitations
apply:
•
Maximum
slave
response
time
when
accessing
the
drive
is
100
ms
•
Maximum
slave
response
time
when
accessing
Solutions
Module
internal
parameters
or
via
a
Solutions
Module
to
a
network
may
be
longer
than
100
ms
(see
specific
Solutions
Module
specifications
for
details)
•
Maximum
number
of
16
bit
registers
that
can
be
written
to,
or
read
from,
the
drive
itself
is
limited
to
16
•
Maximum
number
of
16
bit
registers
that
can
be
written
to,
or
read
from,
a
Solutions
Module
or
via
a
Solutions
Module
-
see
specific
Solutions
Module
specification
•
The
communications
buffer
can
hold
a
maximum
of
128bytes
Modbus
RTU
is
also
supported
via
the
keypad
synchronous
serial
interface.
This
is
covered
in
a
separate
specification
related
to
the
keypad
port.
Modbus
RTU
protocol,
but
with
LCD
keypad
only
When
this
mode
is
selected
it
is
only
possible
to
read
or
write
parameters
in
menu
99
within
the
drive
and
only
using
Modbus
rtu
(excluding
FC40).
Also
Pr
99.29
is
set
to
one
by
the
drive.
If
Pr
99.29
is
set
to
zero
full
communications
is
enabled
for
5
seconds,
after
which
Pr
99.29
is
reset
to
one
by
the
drive.
This
feature
is
provided
so
that
users
can
restrict
the
use
of
the
485
comms
port
to
the
LCD
keypad
only.
When
this
mode
is
selected
access
to
the
restricted
menu
99
is
only
applied
to
the
RS485
port
and
not
the
keypad
port.
This
parameter
can
be
changed
via
the
drive
keypad,
via
a
Solutions
Module
or
via
the
comms
interface
itself.
If
it
is
changed
via
the
comms
interface,
the
response
to
the
command
uses
the
original
baud
rate.
The
master
should
wait
at
least
20
ms
before
sending
a
new
message
using
the
new
baud
rate.
response
from
the
drive
(slave).
The
drive
does
not
respond
until
at
least
1
ms
after
the
message
has
been
received
from
the
host
allowing
1
ms
for
the
host
to
change
from
transmit
to
receive
mode.
This
initial
delay
can
be
extended
using
Pr
11.26
if
required
for
both
ANSI
and
Modbus
RTU
protocols.
146
Mentor
MP
Advanced
User
Guide
www.onxcontrol.com
Issue
Number:
4
11.25
{Si01,
0.66}
Baud
rate
Coding
Bit
SP
FI
DE
TE
VM
DP
ND
RA
NC
NV
PT
US
RW
BU
PS
1
1
1
1
Range
0
to
9
Default
6
Update
rate
Background
read
11.26
Minimum
comms
transmit
delay
Coding
Bit
SP
FI
DE
TE
VM
DP
ND
RA
NC
NV
PT
US
RW
BU
PS
1
1
1
Range
0
to
250
ms
Default
2
Update
rate
Background
read
Parameter
value
String/baud
rate
0
300
1
600
2
1200
3
2400
4
4800
5
9600
6
19200
7
38400
8*
57600
9*
115200