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Modbus communication
A.9 Modbus holding registers tables
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
164
Operating Instructions, 08/2017, A5E37367739-AC
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[units]
(units regis-
ter)
Value range /
Setting options
Access
level
1411
Float / 4
Cable length
Length of the used
sensor cables (One
way). Used for calcu-
lating and compensat-
ing the time delay in
the cables.
0.0
[m]
(8556)
0.0 - 20.0
Read /
write
1441
Unsigned / 2 Perform fre-
quency search
Command to perform a
frequency sweep on a
path.
0
•
0: Frequency sweep
done / not running
•
1: Perform frequency
sweep on path 1
•
2: Perform frequency
sweep on path 2
•
3: Perform frequency
sweep on path 3
•
4: Perform frequency
sweep on path 4
•
5: Perform frequency
sweep on path 5
Read /
write
Sensor spacing
Table A- 20 Sensor spacing settings
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[units]
(units regis-
ter)
Value range /
Setting options
Access
level
1426
Unsigned / 2 Recommended
space method
Recommended spac-
ing method between
clamp-on sensors for
path X. Calculated on
request.
-
•
0: None (default)
•
1: Track 1012TN
•
2: Track 1012TNH
•
3: Track 992
•
4: Spacer bar
1012BN
•
5: Manual
•
6: Spacing Error
Read
only
1420
Unsigned / 2 Clamp-on rec-
ommended
spacing path X
The path the current
recommended spacing
values were calculated
for. 0 means not calcu-
lated since power up.
0
0 - 255
Read
only