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Modbus communication
A.9 Modbus holding registers tables
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
Operating Instructions, 08/2017, A5E37367739-AC
163
General path settings
Table A- 19 General path settings
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[units]
(units regis-
ter)
Value range /
Setting options
Access
level
1400
Unsigned / 2 Installed paths Bit encoded value
containing 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
1401
Unsigned / 2 Path mode
Measurement mode of
paths
1
•
0: Auto (Auto switch
between Doppler and
Transit Time)
•
1: Transit Time
•
2: Doppler
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 peri-
ods
Number of transmit
periods in TX signal
5
1 - 10
Read /
write
1407
Float / 4
Minimum ring-
down delay
Minimum ringdown
delay. Dynamically
calculated ringdown
values below this value
it will be set to the next
higher ringdown echo
value.
0.002
[s]
0.0 - 0.01
Read /
write