The
State
of
Connection
When
the
state
is
shown
as
GOOD
,
it
indicates
that
the
connection
was
successfully
established
and
the
parameter
settings
are
valid.
When
the
state
is
shown
as
TIMEOUT
,
it
indicates
that
the
attempted
connection
has
failed.
To
resolve
this
issue,
check
whether
the
parameters
listed
below
match
the
settings
of
the
RTU
slave
device.
y
Baud
Rate
y
Slave
Address
y
Data
Format
(Data
Bit,
Parity
and
Stop
Bit)
When
the
state
is
shown
as
ERROR:
ILLEGAL
FUNCTION
,
it
indicates
that
the
connection
was
successfully
established,
but
the
parameter
is
invalid.
To
resolve
this
issue,
check
whether
the
Function
Code
listed
in
the
Polling
Definition
match
the
settings
of
the
Modbus
RTU
slave
device.
When
the
state
is
shown
as
ERROR:
ILLEGAL
DATA
VALUE
,
it
indicates
that
the
connection
was
successfully
established,
but
one
or
more
of
the
parameters
are
invalid.
To
resolve
this
issue,
check
whether
the
Start
Address
of
Register
and
Count
of
Register
listed
in
the
Polling
Definition
match
the
settings
of
the
Modbus
RTU
slave
device.
Copyright
©
2014
ICP
DAS
Co.,
Ltd.
All
Rights
Reserved.
∗
E
‐
mail:
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