Siemens SITRANS FST030 - Page 171

Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
1515 Float / 4 Clamp-on spac‐
ing
Spacing (LTN) between clamp-
on sensors for path 2.
0.0
[m]
(8556)
-100.0 - 100.0 Read /
write
1509 Float / 4 Path weight Fixed weighting factor associ‐
ated with path 2.
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)
Path 3 settings
Table A-23 Path 3 settings
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
1550 Float / 4 Sensor frequen‐
cy
Desired sensor frequency for
path 3.
1100000
[Hz]
80000.0 -
4000000.0
Read /
write
1558 Unsigned / 2 Path geometry The number of crossings the sig‐
nal makes through the pipe (Re‐
flect or direct geometry for path
3).
E.g.:
Z path = 1
V path = 2
W path = 4
1 1 - 10 Read /
write
1565 Float / 4 Clamp-on spac‐
ing
Spacing (LTN) between clamp-
on sensors for path 3.
0.0
[m]
(8556)
-100.0 - 100.0 Read /
write
1559 Float / 4 Path weight Fixed weighting factor associ‐
ated with path 3.
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)
Modbus communication
A.9 Modbus holding registers tables
SITRANS FST030 (Modbus)
Operating Instructions, 08/2018, A5E37367739-AD 171