Siemens SITRANS F Series Operating Instructions Manual page 197

Modbus Data type /
register Size in bytes
8439 Float / 4
8441 Float / 4
Totalizer 3 settings
Table A-48 Totalizer 3 settings
Modbus Data type /
register Size in bytes
8505 Unsigned / 2
8502 Unsigned / 2
8523 Float / 4
8525 Float / 4
8527 Float / 4
SITRANS FST030 (Modbus)
Operating Instructions, 08/2018, A5E37367739-AD
Parameter Description
Standard vol‐ Falling below this limit
ume lower causes an alarm when
alarm limit volume flow is selected
as input.
Standard vol‐ Hysteresis that affects
ume alarm hys‐ the alarm and warning
teresis limits when volume
flow is selected as in‐
put.
Parameter Description
Process value Select process value
for totalization.
Fail-safe behav‐ Behavior of the totaliz‐
ior er during the occur‐
ence of bad input value.
Volume upper Exceeding this limit
alarm limit causes an alarm when
volume flow is selected
as input.
Volume upper Exceeding this limit
warning limit causes a warning when
volume flow is selected
as input.
Volume lower Falling below this limit
warning limit causes a warning when
volume flow is selected
as input.
A.9 Modbus holding registers tables
Default value Value range /
[units] Setting options
(units register)
Min. floating
point value
[Sl]
(8422)
0.0 -
[Sl]
(8422)
Default value Value range /
[units] Setting options
(units register)
0
● 0: Cut-off filtered
mass flow
● 1: Cut-off filtered
volume flow
● 27: Cut-off filtered
standard volume flow
(only hydrocarbon
and gas applications)
0
● 0: RUN; totalization is
continued using the
bad input value.
● 1: HOLD; totalization
is stopped.
● 2: MEMORY;
totalization is
continued based on
the last incoming
good value.
Max. floating
point value
[m ]
3
(8521)
Max. floating
point value
[m ]
3
(8521)
Min. floating
point value
[m ]
3
(8521)
Modbus communication
Access
level
Read /
write
Read /
write
Access
level
Read /
write
Read /
write
Read /
write
Read /
write
Read /
write
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