Parameter
structure
Keypad
and
display
Parameter
x.00
Parameter
description
protocol
Performance
The
slave
exception
message
has
the
following
format.
Exception
codes
The
following
exception
codes
are
supported.
Parameter
over
range
during
block
write
FC16
All
devices
have
the
following
compatibility
parameters
defined:
Exception
message
format
format
Advanced
parameter
descriptions
Serial
comms
The
slave
processes
the
write
block
in
the
order
the
data
is
received.
If
a
write
fails
due
to
an
out
of
range
value
then
the
write
block
is
terminated.
However,
the
slave
does
not
raise
an
exception
response,
rather
the
error
condition
is
signalled
to
the
master
by
the
number
of
successful
writes
field
in
the
response.
Parameter
over
range
during
block
read/write
FC23
There
will
be
no
indication
that
there
has
been
a
value
out
of
range
during
a
FC23
access.
6.2.9
CRC
The
CRC
is
a
16bit
cyclic
redundancy
check
using
the
standard
CRC-16
polynomial
x16
+
x15
+
x2
+
1.
The
16bit
CRC
is
appended
to
the
message
and
transmitted
LSB
first.
The
CRC
is
calculated
on
ALL
the
bytes
in
the
frame.
6.2.10
Device
compatibility
parameters
210
Mentor
MP
Advanced
User
Guide
www.onxcontrol.com
Issue
Number:
4
Parameter
Description
Device
ID
Unique
device
identification
code
Minimum
slave
response
time
Maximum
slave
response
time
When
global
addressing,
the
master
must
wait
for
this
time
before
issuing
a
new
message.
In
a
network
of
devices,
the
slowest
time
must
be
used
Maximum
baud
rate
32bit
float
data
type
supported
If
this
data
type
is
not
supported
then
an
over
range
error
will
be
raised
if
this
data
type
is
used
Maximum
buffer
size
Determines
the
maximum
block
size.
Byte
Description
0
Slave
source
node
address
1
Original
function
code
with
bit7
set
2
Exception
code
3
CRC
LSB
4
CRC
MSB
Code
Description
1
Function
code
not
supported
2
Register
address
out
of
range,
or
request
to
read
too
many
registers