The
local
registers
mapping
is
listed
on
the
main
page
of
the
MDC
‐
700
module.
Copyright
©
2014
ICP
DAS
Co.,
Ltd.
All
Rights
Reserved.
∗
E
‐
mail:
‐
31
‐
#
UseComPort
SlaveModbusID FunctionCode RegStartAddr
RegCount
*
1
1
1
0
8
*
1
1
2
0
8
*
2
2
1
0
4
The
MDC
‐
700
allows
users
to
enable/disable
a
polling
definition
by
changing
the
first
field
of
the
polling
definition
section
in
the
config.csv
file.
There
are
three
types
that
users
can
use:
“*”:
Asterisk
symbol
means
that
this
is
a
valid
polling
definition.
The
MDC
‐
700
will
assign
local
register
for
data
defined
in
the
definition
and
save
the
polled
data
to
the
mapping
local
register.
“
‐
”:
Minus
sign
means
that
this
is
a
disabled
polling
definition.
The
MDC
‐
700
will
assign
local
register
for
data
defined
in
the
definition
but
will
not
poll
the
data.
“”:
Empty
means
that
this
is
a
null
polling
definition.
The
MDC
‐
700
will
neither
assign
local
register
for
data
defined
in
the
definition
nor
poll
data.
With
the
function
of
retaining
register
space
mapped
for
specific
devices,
or
releasing
those
spaces
mapped
but
reserving
the
definition,
the
main
program
on
the
Modbus
master
device
can
be
applied
in
similar
applications
where
users
would
like
to
change
or
stop
some
devices
without
modification
or
with
minimum
level
of
modification.
