Siemens SITRANS FST030 - Page 163

Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
1719 Float / 4 Calibration ref‐
erence pressure
Setup parameter for
specifying the process
pressure at which the
flow calibration of the
meter is performed.
The value is used for
compensation of pipe
expansion due to pres‐
sure.
700000.0
[Pa]
(8015)
0.0 - 100000000.0 Read /
write
1721 Float / 4 Pipe modulus
elasticity
Setup parameter for
specifying the pipe ma‐
terial modulus of expan‐
sion. The value is used
for compensation of
pipe expansion due to
pressure.
200.0E+9
[Pa]
(8015)
1.0E+6 - 1.0E+12 Read /
write
Upstream and downstream conditions
Table A-16 Upstream and downstream conditions
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
1220 Unsigned / 2 Upstream pipe
geometry
Compensation for up‐
stream pipe geometry.
0
● 0: Straight run
● 1: Single elbow
● 2: Double elbow (in-
plane)
● 3: Double elbow (out-
of-plane)
● 4: Reducer
● 5: Expansion
Read /
write
1221 Unsigned / 2 Upstream dis‐
tance
The distance to the up‐
stream flow disturb‐
ance in multiples of in‐
ner pipe diameter.
0 0 - 40 Read /
write
Modbus communication
A.9 Modbus holding registers tables
SITRANS FST030 (Modbus)
Operating Instructions, 08/2018, A5E37367739-AD 163