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Modbus communication
A.9 Modbus holding registers tables
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
Operating Instructions, 08/2017, A5E37367739-AC
165
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[units]
(units regis-
ter)
Value range /
Setting options
Access
level
1421
Float / 4
Clamp-on rec-
ommended
spacing ideal
Recommended ideal
spacing distance (LTN)
between clamp-on
sensors for path X.
Calculated on request.
0.0
[m]
(8556)
-
Read
only
1423
Float / 4
Recommended
spacing
Recommended spac-
ing distance (LTN
corresponding to rec-
ommended spacing
index) between clamp-
on sensors for path X.
Calculated on request.
0.0
[m]
(8556)
-
Read
only
1425
Unsigned / 2 Recommended
spacing (index)
Recommended spac-
ing index between
clamp-on sensors for
path X for the given
spacing method. Cal-
culated on request.
0
0 to 255
Read
only
1442
Unsigned / 2 Calculate spac-
ing
Command to calculate
recommended spacing
distance, recommend-
ed spacing method and
recommended spacing
index for a given path.
0
•
0: Calculation done /
not running
•
1: Perform calcula-
tion on path 1
•
2: Perform calcula-
tion on path 2
•
3:.Perform calcula-
tion on Path 3
•
4: Perform calcula-
tion on path 4
•
5: Perform calcula-
tion on path 5
Read /
write