Siemens SITRANS F series Operating Instructions Manual page 221

Modbus Data type /
register Size in bytes
9109 Unsigned / 2
9106 Unsigned / 2
9166 Float / 4
9168 Float / 4
9110 Float / 4
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
Operating Instructions, 08/2017, A5E37367739-AC
Parameter Description
Flow direction Flow direction filter
applicable for Process
values (9102) = 0, 1,
19 and 27.
Current mode Mode of current output. 0
Upper range Upper volume flow
value volume value that is mapped to
flow the upper nominal
range boundary se-
lected by Current mode
(9106). Applicable if
Process value (9102) =
1.
Lower range Lower volume flow
value volume value that is mapped to
flow the lower nominal
range boundary se-
lected by Current mode
(9106). Applicable if
Process value (9102) =
1.
Upper range Upper mass flow value
value mass flow that is mapped to the
upper nominal range
boundary selected by
Current mode (9106).
Applicable if Process
value (9102) = 0.
A.9 Modbus holding registers tables
Default value Value range /
[units] Setting options
(units regis-
ter)
0
0: Positive direction
•
1: Negative direction
•
2: Positive and nega-
•
tive directions
3: Positive and nega-
•
tive directions (sym-
metric mode)
0: 4-20 mA (3.5) 3.8-
•
20.5 (22.6) NAMUR
1: 4-20 mA (3.75)
•
4.0-20.8 (22.6) US
2: 4-20 mA (2.0) 4.0-
•
20.5 (22.0)
3: 4-20 mA (2.0) 4.0-
•
24.0 (25.0)
4: 0-20 mA (0.0) 0.0-
•
20.5 (22.0)
5: 0-20 mA (0.0) 0.0-
•
24.0 (25.0)
0.4 % • max. -
volume flow
[m /s]
3
(7500)
0.0 -
[m /s]
3
(7500)
0.2 • max. -
mass flow
[kg/s]
(7400)
Modbus communication
Access
level
Read /
write
Read /
write
Read /
write
Read /
write
Read /
write
219