Siemens SITRANS FST030 - Page 167

Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
1314 Float / 4 Sensor phase
velocity
The velocity at
which the wave
fronts traverse
the interface be‐
tween the
wedge and the
pipe.
3695.5
[m/s]
(7648)
2000.0 - 10000.0 Read /
write
1316 Float / 4 Sensor inactive
wedge
The part of the
wedge that is not
part of the sound
path.
0.00076
[m]
(8556)
0.0 - 0.05 Read /
write
1318 Float / 4 Sensor fixed
time
Fixed time in
sensor wedge.
10.61E-6
[s]
2.0E-6 - 200.0E-6 Read /
write
1320 Float / 4 Mounting hole
offset
Distance be‐
tween spacer
hole and sensor
front face.
0.00953
[m]
(8556)
0.0 - 0.05 Read /
write
1322 Unsigned / 2 Pipe travel time Designated mul‐
tiplier on the
crystal projec‐
tion value used
in formula for cal‐
culating pipe
travel.
0 0 - 200 Read /
write
1711 Float / 4 Temperature
compensation
factor
Sensor tempera‐
ture compensa‐
tion slope factor.
0.00063761
[1/K]
0.0001 - 0.0009 Read /
write
1713 Unsigned / 2 Reference tem‐
perature
Sensor refer‐
ence (nominal)
temperature.
0
● 0: 21 °C
● 1: 60 °C
● 2: 93 °C
Read /
write
Modbus communication
A.9 Modbus holding registers tables
SITRANS FST030 (Modbus)
Operating Instructions, 08/2018, A5E37367739-AD 167