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Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[units]
(units register)
Value range /
Setting options
Access
level
8439
Float / 4
Standard vol‐
ume lower
alarm limit
Falling below this limit
causes an alarm when
volume flow is selected
as input.
Min. floating
point value
[Sl]
(8422)
Read /
write
8441
Float / 4
Standard vol‐
ume alarm hys‐
teresis
Hysteresis that affects
the alarm and warning
limits when volume
flow is selected as in‐
put.
0.0
[Sl]
(8422)
-
Read /
write
Totalizer 3 settings
Table 4-29
Totalizer 3 settings
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[units]
(units register)
Value range /
Setting options
Access
level
8505
Unsigned / 2
Process value
Select process value
for totalization.
0
● 0: Cut-off filtered
mass flow
● 1: Cut-off filtered
volume flow
● 4: Corrected volume
flow
● 5: Fractional flow
medium A
● 5: Fractional flow
medium B
Read /
write
8502
Unsigned / 2
Fail-safe behav‐
ior
Behavior of the totaliz‐
er during the occur‐
ence of bad input value.
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.
Read /
write
8523
Float / 4
Volume upper
alarm limit
Exceeding this limit
causes an alarm when
volume flow is selected
as input.
Max. floating
point value
[m
3
]
(8521)
Read /
write
8525
Float / 4
Volume upper
warning limit
Exceeding this limit
causes a warning when
volume flow is selected
as input.
Max. floating
point value
[m
3
]
(8521)
Read /
write
MODBUS commands
4.10 Modbus holding registers tables
FCT030 Modbus (From firmware 4.0)
78
Function Manual, 06/2018, A5E39931813-AB