Siemens SITRANS F series Operating Instructions Manual page 213

Modbus Data type /
register Size in bytes
10042 Float / 4
10068 Float / 4
10070 Float / 4
8908 Float / 4
8939 Unsigned / 2
8940 Float / 4
7149 Float / 4
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
Operating Instructions, 08/2017, A5E37367739-AC
Parameter Description
Lower range Lower process viscosi-
value viscosity ty value that is mapped
to the lower nominal
range boundary se-
lected by Frequency
value low (8937). Ap-
plicable if Process
value (8904) = 21 or
29.
Upper range Upper rate of change
value ROC value that is mapped to
the upper nominal
range boundary se-
lected by Frequency
value high (8935).
Applicable if Process
value (8904) = 36.
Lower range Lower rate of change
value ROC value that is mapped to
the lower nominal
range boundary se-
lected by Frequency
value low (8937). Ap-
plicable if Process
value (8904) = 36.
Damping value Time constant of
damping filter for fre-
quency output signal.
Fail-safe behav- Frequency output reac-
ior tion in case of a fault.
Fail-safe value Output value in case of
a fault and when Fail-
safe behavior (8939) is
configured to 4.
Forced value Forced value when
forcing is active.
A.9 Modbus holding registers tables
Default value Value range /
[units] Setting options
(units regis-
ter)
0.0 -
[m²/s]
(7524)
1.0 -
[m/s²]
(8564)
0.0 -
[m/s²]
(8564)
0.0 0.0 - 100.0
[s]
2
0: Frequency value
•
low
1: Frequency value
•
high
2: Last valid value
•
3: Disabled
•
4: Custom value
•
0.0 0.0 - 12500.0
[Hz]
1.0 0.0 - 12500.0
[Hz]
Modbus communication
Access
level
Read /
write
Read /
write
Read /
write
Read /
write
Read /
write
Read /
write
Read /
write
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