Siemens SITRANS F Series, Operating Instructions Manual, Page: 206 / 362

Modbus communication
A.9 Modbus holding registers tables
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
204
Operating Instructions, 08/2017, A5E37367739-AC
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units regis-
ter)
Value range /
Setting options
Access
level
10066 Float / 4 Lower range
value ROC
Lower rate of change
value that is mapped to
the lower nominal
range boundary se-
lected by current mode
(8806). Applicable if
Process value (8802) =
36.
0.0
[m/s²]
(8564)
- Read /
write
8807 Float / 4 Damping value Time constant of
damping filter for cur-
rent output signal.
0.0
[s]
0.0 - 100.0 Read /
write
8814 Unsigned / 2 Fail-safe behav-
ior
Current output reaction
in case of a fault.
0
•
0: Lower fault current
• 1: Upper fault current
•
2: Last valid value
• 3: Disabled
•
4: Custom value
Read /
write
8815 Float / 4 Fail-safe value Output value in case of
a fault and when Fail-
safe behavior (8814) is
configured to 4.
0.0
[mA]
0.0 - 25.0 Read /
write
7146 Float / 4 Forced value Forced value when
forcing is active.
4.0
[mA]
3.5 - 25.0 Read /
write
8886 Float / 4 Offset adjust-
ment
Command to trim the
lower range value of
the loop current.
Simulate a loop current
of 4.0 mA, measure the
current with an ampere
meter and write the
measured value to this
register.
[mA] 0.0 - 25.0 Write
only
8888 Float / 4 Gain adjust-
ment
Command to trim the
upper range value of
the loop current.
Simulate a loop current
of 20.0 mA, measure
the current with an
ampere meter and
write the measured
value to this register.
[mA] 0.0 - 25.0 Write
only