Siemens SITRANS F Series, Руководство по эксплуатации, Страница: 209 / 362

Modbus communication
A.9 Modbus holding registers tables
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
Operating Instructions, 08/2017, A5E37367739-AC
207
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units regis-
ter)
Value range /
Setting options
Access
level
8910 Unsigned / 2 Flow direction Flow direction filter
applicable for Process
values (8904) set to 0,
1, 19, or 27.
0
• 0: Positive direction
•
1: Negative direction
• 2: Positive and nega-
tive directions
•
3: Positive and nega-
tive directions (sym-
metric mode)
Read /
write
8935 Float / 4 Frequency
value high
Upper frequency value.
Upper nominal output
range boundary.
10000.0
[Hz]
0.0 - 12500.0 Read /
write
8937 Float / 4 Frequency
value low
Lower frequency value.
Lower nominal output
range boundary.
0.0
[Hz]
0.0 - 12500.0 Read /
write
8915 Float / 4 Upper range
value volume
flow
Upper volume flow
value that is mapped to
the upper nominal
range boundary se-
lected by Frequency
value high (8935).
Applicable if Process
value (8904) = 1.
0.4 % • max.
volume flow
[m
3
/s]
(7500)
- Read /
write
8917 Float / 4 Lower range
value volume
flow
Lower volume flow
value that is mapped to
the lower nominal
range boundary se-
lected by Frequency
value low (8937). Ap-
plicable if Process
value (8904) = 1.
0.0
[m
3
/s]
(7500)
- Read /
write
8911 Float / 4 Upper range
value mass flow
Upper mass flow value
that is mapped to the
upper nominal range
boundary selected by
Frequency value high
(8935). Applicable if
Process value (8904) =
0.
0.2 • max .
mass flow-
[kg/s]
(7400)
- Read /
write
8913 Float / 4 Lower range
value mass flow
Lower mass flow value
that is mapped to the
lower nominal range
boundary selected by
Frequency value low
(8937). Applicable if
Process value (8904) =
0.
0.0
[kg/s]
(7400)
- Read /
write