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Modbus communication
A.9 Modbus holding registers tables
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
Operating Instructions, 08/2017, A5E37367739-AC
305
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[unit]
(unit register)
Value range /
Setting options
Access
level
3508
Float / 4
Sound velocity
path 3
Sound velocity
-
-
Read
only
3510
Float / 4
Flow velocity
path 3
Flow velocity
-
-
Read
only
3512
Float / 4
Delta time path
3
Delta time
-
-
Read
only
3514
Float / 4
Travel time up
path 3
Travel time of up-
stream signal
-
-
Read
only
3516
Float / 4
Travel time
down path 3
Travel time of down-
stream signal
-
-
Read
only
3518
Float / 4
Correlation
factor path 3
Correlation factor
-
-
Read
only
3524
Unsigned / 2 Accepted burst
percentage
path 3
% of bursts accepted
(path 3).
Based on various di-
agnostic input (i.e.
correlation strength,
gain level, SNR, etc.)
the meter may reject
specific up/down re-
ceived sets or bursts.
The percentage of
accepted bursts is one
measure of the appli-
cation’s health.
-
-
Read
only
3525
Float / 4
Actual sensor
frequency path
3
Sensor frequency
-
-
Read
only
3529
Float / 4
Upstream peak
amplitude path
3
Upstream signal peak
amplitude
-
-
Read
only
3527
Float / 4
Downstream
peak amplitude
path 3
Downstream signal
peak amplitude
-
-
Read
only
3531
Float / 4
Fluid refraction
angle path 3
Calculated fluid refrac-
tion angle on path 3
(clamp-on only).
-
-
Read
only
Table A- 99 Path 4 diagnostics
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[unit]
(unit register)
Value range /
Setting options
Access
level
3550
Float / 4
RxGain up path
4
Rx gain of upstream
signal
-
-
Read
only
3552
Float / 4
RxGain down
path 4
Rx gain of downstream
signal
-
-
Read
only
Содержание SITRANS F Series
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