Siemens SITRANS F series Operating Instructions Manual page 306

Modbus communication
A.9 Modbus holding registers tables
Modbus Data type /
register Size in bytes
3462 Float / 4
3464 Float / 4
3466 Float / 4
3468 Float / 4
3474 Unsigned / 2
3475 Float / 4
3479 Float / 4
3477 Float / 4
3481 Float / 4
Table A- 98 Path 3 diagnostics
Modbus Data type /
register Size in bytes
3500 Float / 4
3502 Float / 4
3504 Float / 4
3506 Float / 4
304
Parameter Description
Delta time path Delta time
2
Travel time up Travel time of up-
path 2 stream signal
Travel time Travel time of down-
down path 2 stream signal
Correlation Correlation factor
factor path 2
Accepted burst % of bursts accepted
percentage (path 2).
path 2
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.
Actual sensor Sensor frequency
frequency path
2
Upstream peak Upstream signal peak
amplitude path amplitude
2
Downstream Downstream signal
peak amplitude peak amplitude
path 2
Fluid refraction Calculated fluid refrac-
angle path 2 tion angle on path 2
(clamp-on only).
Parameter Description
RxGain up path Rx gain of upstream
3 signal
RxGain down Rx gain of downstream
path 3 signal
SNR upstream Signal to noise ration
path 3 of upstream signal
SNR down- Signal to noise ration
stream path 3 of downstream signal
Default value Value range /
[unit] Setting options
(unit register)
- -
- -
- -
- -
- -
- -
- -
- -
- -
Default value Value range /
[unit] Setting options
(unit register)
- -
- -
- -
- -
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
Operating Instructions, 08/2017, A5E37367739-AC
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