Siemens SITRANS F Series, Руководство по эксплуатации, Страница: 213 / 362

Modbus communication
A.9 Modbus holding registers tables
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
Operating Instructions, 08/2017, A5E37367739-AC
211
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units regis-
ter)
Value range /
Setting options
Access
level
10042 Float / 4 Lower range
value viscosity
Lower process viscosi-
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.
0.0
[m²/s]
(7524)
- Read /
write
10068 Float / 4 Upper range
value ROC
Upper rate of change
value that is mapped to
the upper nominal
range boundary se-
lected by Frequency
value high (8935).
Applicable if Process
value (8904) = 36.
1.0
[m/s²]
(8564)
- Read /
write
10070 Float / 4 Lower range
value ROC
Lower rate of change
value that is mapped to
the lower nominal
range boundary se-
lected by Frequency
value low (8937). Ap-
plicable if Process
value (8904) = 36.
0.0
[m/s²]
(8564)
- Read /
write
8908 Float / 4 Damping value Time constant of
damping filter for fre-
quency output signal.
0.0
[s]
0.0 - 100.0 Read /
write
8939 Unsigned / 2 Fail-safe behav-
ior
Frequency output reac-
tion in case of a fault.
2
• 0: Frequency value
low
•
1: Frequency value
high
• 2: Last valid value
•
3: Disabled
• 4: Custom value
Read /
write
8940 Float / 4 Fail-safe value Output value in case of
a fault and when Fail-
safe behavior (8939) is
configured to 4.
0.0
[Hz]
0.0 - 12500.0 Read /
write
7149 Float / 4 Forced value Forced value when
forcing is active.
1.0
[Hz]
0.0 - 12500.0 Read /
write