General path settings
Table A-19 General path settings
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
1400 Unsigned / 2 Installed paths Bit encoded value con‐
taining installed paths
for clamp-on systems.
0
● Bit 0: Path 1 installed
● Bit 1: Path 2 installed
● Bit 2: Path 3 installed
● Bit 3: Path 4 installed
● Bit 4: Path 5 installed
Read /
write
1402 Unsigned / 2 Pre amp selec‐
tion
Enable or disable pre-
amplifiers on all paths.
0
● 0: Based on register
1300 Sensor type (on
for clamp-on)
● 1: Off
● 2: On
● 3: Half TX signal
amplitude
Read /
write
1403 Unsigned / 2 Tx wave periods Number of transmit pe‐
riods in TX signal
5 1 - 10 Read /
write
1407 Float / 4 Minimum ring‐
down delay
Minimum ringdown de‐
lay. Dynamically calcu‐
lated ringdown values
below this value it will
be set to the next high‐
er ringdown echo value.
0.002
[s]
0.0 - 0.01 Read /
write
1411 Float / 4 Cable length Length of the used sen‐
sor cables (One way).
Used for calculating
and compensating 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
Modbus communication
A.9 Modbus holding registers tables
SITRANS FST030 (Modbus)
168 Operating Instructions, 08/2018, A5E37367739-AD
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