Totalizers - Siemens SITRANS F Series Operating Instructions Manual

Rate of change (ROC) settings
Table A-45 Rate of change (ROC) settings
Modbus Data type /
register Size in bytes
7540 Float / 4
7538 Float / 4
7542 Float / 4
1876 unsigned / 2
A.9.4.3

Totalizers

Totalizer 1 settings
Table A-46 Totalizer 1 settings
Modbus Data type /
register Size in bytes
8305 Unsigned / 2
8302 Unsigned / 2
SITRANS FST030 (Modbus)
Operating Instructions, 08/2018, A5E37367739-AD
Parameter Description
Upper alarm Exceeding this limit causes an
limit alarm.
Upper warning Exceeding this limit causes a
limit warning.
Hysteresis Hysteresis that affects the alarm
and warning limits.
ROC time inter‐ Time interval for Rate Of
val Change calculation
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.
A.9 Modbus holding registers tables
Default value Value range /
[units] Setting options
(units register)
Max. floating -
point value
[m/s2]
(8564)
Max. floating -
point value
[m/s2]
(8564)
0.0 -
[m/s2]
(8564)
10 1 - 300
[s]
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.
Modbus communication
Access
level
Read /
write
Read /
write
Read /
write
Read /
write
Access
level
Read /
write
Read /
write
193