Siemens SITRANS FST030 - Page 172

Path 4 settings
Table A-24 Path 4 settings
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
1600 Float / 4 Sensor frequen‐
cy
Desired sensor frequency for
path 4.
1100000
[Hz]
80000.0 -
4000000.0
Read /
write
1608 Unsigned / 2 Path geometry The number of crossings the sig‐
nal makes through the pipe (Re‐
flect or direct geometry for path
4).
E.g.:
Z path = 1
V path = 2
W path = 4
1 1 - 10 Read /
write
1615 Float / 4 Clamp-on spac‐
ing
Spacing (LTN) between clamp-
on sensors for path 4.
0.0
[m]
(8556)
-100.0 - 100.0 Read /
write
1609 Float / 4 Path weight Fixed weighting factor associ‐
ated with path 4.
For clamp-on systems the instal‐
led paths weightings should be
identical but not zero.
For inline systems the sum of
the installed paths weightings
should be 1.0.
1.0 0.01 - 2.0 Read /
write
(Expert)
User calibration
Table A-25 User calibration
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
1000 Float / 4 Slope correc‐
tion factor
Define positive and
negative flow direction.
Default positive flow di‐
rection is indicated by
the arrow on the sen‐
sor.
1.0 0.5 - 2.0 Read /
write
1006 Float / 4 Path 1 offset User calibrated zero off‐
set for path 1.
Calibrated delta time =
delta time + Path 1 fac‐
tory offset + Path 1 off‐
set.
0.0
[s]
-1.25E-6 - +1.25E-6 Read /
write
Modbus communication
A.9 Modbus holding registers tables
SITRANS FST030 (Modbus)
172 Operating Instructions, 08/2018, A5E37367739-AD