Siemens SITRANS FST030 - Page 186

Sound velocity settings
Table A-33 Sound velocity settings
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
7624 Float / 4 Upper alarm
limit
Exceeding this limit
causes an alarm.
Max. floating
point value
[m/s]
(7648)
- Read /
write
7626 Float / 4 Upper warning
limit
Exceeding this limit
causes a warning.
Max floating
point value
[m/s]
(7648)
- Read /
write
7628 Float / 4 Lower warning
limit
Falling below this limit
causes a warning.
Min. floating
point value
[m/s]
(7648)
- Read /
write
7630 Float / 4 Lower alarm
limit
Falling below this limit
causes an alarm.
Min. floating
point value
[m/s]
(7648)
- Read /
write
7632 Float / 4 Hysteresis Hysteresis that affects
the alarm and warning
limits.
0.0
[m/s]
(7648)
- Read /
write
LiquIdent settings
Table A-34 Liquident settings (only hydrocarbon applications)
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
1727 Float / 4 LiquIdent tem‐
perature slope
factor
Specifies a tempera‐
ture slope factor used
in connection with the
standard condition tem‐
perature for calculating
liquident.
-4.10
[m/K*s]
-8.0 - 0.0 Read /
write
1729 Float / 4 LiquIdent pres‐
sure slope fac‐
tor
Specifies a pressure
slope factor used in
connection with the
standard condition tem‐
perature for calculating
liquident.
0.00000435 0.0 - 0.00003 Read /
write
7040 Float / 4 Upper alarm
limit
Exceeding this limit
causes an alarm.
Max. floating
point value
[m/s]
(8014)
- Read /
write
Modbus communication
A.9 Modbus holding registers tables
SITRANS FST030 (Modbus)
186 Operating Instructions, 08/2018, A5E37367739-AD