WIKA IPT-11, Operating Instructions Manual

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Byte-No.
1 2 3 4 5 6 7 8 9 10
Format
Value
IEEE-754-
Flieskommazahl
PA-OUT
(FB1)
Status
Status
(FB1)
IEEE-754-
Flieskommazahl
Temperature
(FB2)
Status
Status
(FB2)
F ig . 19 : T elegram con fi guration example 2
E xample
3
with pressure value and additional cyclical value without temperature value :
l
AI ( PA - OUT )
l
F ree P lace
l
A dditional C yclic V alue
Byte-No.
1 2 3 4 5 6 7 8 9 10
Status
Status
Status
Status
(FB1)
IEEE-754-
Floating point value
PA-OUT
(FB1)
IEEE-754-
Floating point value
Additional Cyclic
Value
Format
Value
F
ig
.
20
: T
elegram con fi guration example 3
D
ata format of the output signal
Byte4 Byte3 Byte2 Byte1 Byte0
Status Value (IEEE-754)
F ig . 21 : D ata format of the output signal
T he status byte corresponds to pro fi le
3
.
0
"
P ro fi bus PA P ro fi le for P rocess C ontrol D evices
"
coded .
T he status " M easured value OK " is coded as
80
( hex ) ( B it
7
=
1
, B it
6
…
0
=
0
).
T he measured value is transferred as a
32
bit fl oating point number in the IEEE -
754
format .
Byte n
Byte n+1
Bit
7
VZ
Exponent
Bit
6
2
Bit
5
2
Bit
4
2
Bit
3
2
Bit
2
2
Bit
1
2
Bit
0
2
Bit
7
2
Bit
6
2
Bit
5
2
Bit
4
2
Bit
3
2
Bit
2
2
Bit
1
2
Bit
0
2
Sign
Bit
Significant
7 6 5 4 3
2 1
0
-1
-2 -3 -4
-5
-6 -7
Byte n+2
Byte n+3
Bit
7
2
Significant
Bit
6
2
Bit
5
2
Bit
4
2
Bit
3
2
Bit
2
2
Bit
1
2
Bit
0
2
Bit
7
2
Bit
6
2
Bit
5
2
Bit
4
2
Bit
3
2
Bit
2
2
Bit
1
2
Bit
0
2
Significant
-9 -10 -11 -12 -13 -14 -15 -16 -17 -18 -19 -20 -21 -22 -23
-8
Value = (-1)
VZ
2
(Exponent - 127)
(1 + Significant)
F ig . 22 : D ata format of the measured value
P
rocess pressure transmitter
IPT -
11
V
ers
.
4
.
0
-
ceramic sensor
• P
ro fi bus
PA
51
10
S
upplement
31547
-
EN
-
081211