1
F
unction as
M
odbus
-
TCP
server
1
.
1
M
odbus
-
TCP
-
general description
VEGAMET
624
/
625
,
VEGASCAN
693
and
PLICSRADIO
®
C
62
signal conditioning instruments work as
M
odbus
-
TCP
server and provide the existing
PC
/
DCS
value and relay
switching conditions in a temporary storage for collection via
M
odbus
-
TCP
.
T
he instruments stick to the
"
O
pen
M
odbus
-
TCP
-
S
peci
fi
ca
-
tion
"
R
elease
1
.
0
of
S
chneider
E
lectric
.
T
his standard is
supported by many process control systems
,
R
emote
IO
s
,
visualisation programs and
OPC
servers
.
C
ommunication is
carried out via
P
ort
502
.
A
part from
PC
/
DCS
values there is the possibility to enquire
the switching conditions of the relay outputs
.
T
he enquiry of the
PC
/
DCS
values and relay values is made
via the appropriate function code
(
see also
M
odbus speci
fi
-
cation
).
l
F
unction code
01
:
R
ead
C
oil
S
tatus
(
enquiry of the relay
values
)
l
F
unction code
02
:
R
ead
I
nput
S
tatus
(
enquiry of the relay
values
)
l
F
unction code
03
:
R
ead
H
olding
R
egisters
(
enquiry of the
PC
/
DCS
values
)
l
F
unction code
04
:
R
ead
I
nput
R
egisters
(
enquiry of the
PC
/
DCS
values
)
T
hese function codes are normally available as library
enquiries in the
PLC
(
e
.
g
.
M
odicon
).
VEGAMET
624
/
625
and
PLICSRADIO
®
C
62
can provide up to
six
PC
/
DCS
outputs
,
VEGASCAN
693
up to
30
.
T
here are also
four relay values
(
one fail safe relay
,
three level relais
,
with
VEGASCAN
one fail safe relay
).
V
ia the selected
PC
/
DCS
output you de
fi
ne where the
respective measured value can be collected within the
temporary memory
.
T
he con
fi
guration of the
PC
/
DCS
outputs
is carried out via
PACT
ware
™
/
DTM
.
1
.
2
F
iling of the measured value as
2
byte short
T
he adressing of the
PC
/
DCS
values for
M
odbus systems is
carried out
"
W
ord
-
orientated
"
.
I
n the temporary memory
,
a
PC
/
PC
/
DCS
output
M
odbus
-
TCP
,
VEGA ASCII
protocol
-
VEGAMET
624
/
625
,
VEGASCAN
693
,
PLICSRADIO
3
F
unction as
M
odbus
-
TCP
server
30768
-
EN
-
070730
Содержание VEGAMET 624
Страница 37: ...Modbus TCP VEGA ASCII protocol VEGAMET 624 625 VEGASCAN 693 PLICSRADIO 37 VEGA ASCII protocol 30768 EN 070730...
Страница 38: ...38 Modbus TCP VEGA ASCII protocol VEGAMET 624 625 VEGASCAN 693 PLICSRADIO VEGA ASCII protocol 30768 EN 070730...
Страница 39: ...Modbus TCP VEGA ASCII protocol VEGAMET 624 625 VEGASCAN 693 PLICSRADIO 39 VEGA ASCII protocol 30768 EN 070730...