Siemens SITRANS FST030 - Process Values

A.9.4.2 Process values
Volume flow settings
Table A-29 Volume flow settings
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
7510 Float / 4 Low flow cut-off Volume flow limit for
low flow cut-off. Below
limit volume flow output
is forced to zero.
Sensor size
specific
0 - max. volume flow Read /
write
7501 Float / 4 Upper alarm
limit
Exceeding this limit
causes an alarm.
max. volume
flow
[m
3
/s]
(7500)
-max. volume flow -
+max. volume flow
Read /
write
7503 Float / 4 Upper warning
limit
Exceeding this limit
causes a warning.
max. volume
flow
[m
3
/s]
(7500)
-max. volume flow -
+max. volume flow
Read /
write
7505 Float / 4 Lower warning
limit
Falling below this limit
causes a warning.
-max. volume
flow
[m
3
/s]
(7500)
-max. volume flow -
+max. volume flow
Read /
write
7507 Float / 4 Lower alarm
limit
Falling below this limit
causes an alarm.
-max. volume
flow
[m
3
/s]
(7500)
-max. volume flow -
+max. volume flow
Read /
write
7512 Float / 4 Hysteresis Hysteresis that affects
the alarm and warning
limits.
0.0
[m
3
/s]
(7500)
0 - max. volume flow Read /
write
Mass flow settings
Table A-30 Mass flow settings
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
7410 Float / 4 Low flow cut-off Mass flow limit for low
flow cut-off. Below limit
mass flow output is
forced to zero.
0.001 x max.
mass flow
[kg/s]
(7400)
0 - max. mass flow Read /
write
7401 Float / 4 Upper alarm
limit
Exceeding this limit
causes an alarm.
max. mass
flow
[kg/s]
(7400)
-max. mass flow -
+max. mass flow
Read /
write
Modbus communication
A.9 Modbus holding registers tables
SITRANS FST030 (Modbus)
Operating Instructions, 08/2018, A5E37367739-AD 183