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Modbus communication
A.9 Modbus holding registers tables
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
Operating Instructions, 08/2017, A5E37367739-AC
155
A.9.4
Setup
A.9.4.1
Sensor
Sensor settings
Table A- 14 General sensor settings
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[units]
(units regis-
ter)
Value range /
Setting options
Access
level
1801
Unsigned / 2 Flow direction
Define positive and
negative flow direction.
Default positive flow
direction is indicated by
an arrow on the sen-
sor.
1
•
0: Negative: The flow
is measured '+' in de-
fault negative direc-
tion and '-' in default
positive direction.
•
1: Positive: The flow
is measured '+' in de-
fault positive direction
and '-' in default neg-
ative direction.
Read /
write
Pipe settings (clamp-on)
Table A- 15 Pipe settings
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[units]
(units regis-
ter)
Value range /
Setting options
Access
level
1200
Float / 4
Outer pipe
diameter
External pipe diameter. 0.1
[m]
(8556)
0.006 - 10.0
Read /
write
1202
Float / 4
Wall thickness Pipe wall thickness.
0.001
[m]
(8556)
1.0E-6 - 0.5
Read /
write
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