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Modbus communication
A.9 Modbus holding registers tables
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
Operating Instructions, 08/2017, A5E37367739-AC
187
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[units]
(units regis-
ter)
Value range /
Setting options
Access
level
11506
Float / 4
Lower alarm
limit
Falling below this limit
causes an alarm.
Min. floating
point value
[cSt]
(7524)
-
Read /
write
11508
Float / 4
Hysteresis
Hysteresis that affects
the alarm and warning
limits.
0.0
[cSt]
(7524)
-
Read /
write
Pressure settings
Table A- 39 Pressure settings
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[units]
(units regis-
ter)
Value range /
Setting options
Access
level
7662
Float / 4
Upper alarm
limit
Exceeding this limit
causes an alarm.
Max. floating
point value
[Pa]
(8015)
-
Read /
write
7664
Float / 4
Upper warning
limit
Exceeding this limit
causes a warning.
Max. floating
point value
[Pa]
(8015)
-
Read /
write
7666
Float / 4
Lower warning
limit
Falling below this limit
causes a warning.
Min. floating
point value
[Pa]
(8015)
-
Read /
write
7668
Float / 4
Lower alarm
limit
Falling below this limit
causes an alarm.
Min. floating
point value
[Pa]
(8015)
-
Read /
write
7670
Float / 4
Hysteresis
Hysteresis that affects
the alarm and warning
limits.
0.0
[Pa]
(8015)
-
Read /
write