Siemens SITRANS FST030 - Page 198

Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
8529 Float / 4 Volume lower
alarm limit
Falling below this limit
causes an alarm when
volume flow is selected
as input.
Min. floating
point value
[m
3
]
(8521)
Read /
write
8531 Float / 4 Volume alarm
hysteresis
Hysteresis that affects
the alarm and warning
limits when volume
flow is selected as in‐
put.
0.0
[m
3
]
(8521)
- Read /
write
8506 Float / 4 Mass upper
alarm limit
Exceeding this limit
causes an alarm when
mass flow is selected
as input.
Max. floating
point value
[kg]
(8520)
Read /
write
8508 Float / 4 Mass upper
warning limit
Exceeding this limit
causes a warning when
mass flow is selected
as input.
Max. floating
point value
[kg]
(8520)
Read /
write
8510 Float / 4 Mass lower
warning limit
Falling below this limit
causes a warning when
mass flow is selected
as input.
Min. floating
point value
[kg]
(8520)
Read /
write
8512 Float / 4 Mass lower
alarm limit
Falling below this limit
causes an alarm when
mass flow is selected
as input.
Min. floating
point value
[kg]
(8520)
Read /
write
8514 Float / 4 Mass alarm hys‐
teresis
Hysteresis that affects
the alarm and warning
limits when mass flow
is selected as input.
0.0
[kg]
(8520)
- Read /
write
8533 Float / 4 Standard vol‐
ume upper
alarm limit
Exceeding this limit
causes an alarm when
volume flow is selected
as input.
Max. floating
point value
[Sl]
(8522)
Read /
write
8535 Float / 4 Standard vol‐
ume upper
warning limit
Exceeding this limit
causes a warning when
volume flow is selected
as input.
Max. floating
point value
[Sl]
(8522)
Read /
write
8537 Float / 4 Standard vol‐
ume lower
warning limit
Falling below this limit
causes a warning when
volume flow is selected
as input.
Min. floating
point value
[Sl]
(8522)
Read /
write
8539 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]
(8522)
Read /
write
8541 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]
(8522)
- Read /
write
Modbus communication
A.9 Modbus holding registers tables
SITRANS FST030 (Modbus)
198 Operating Instructions, 08/2018, A5E37367739-AD