Siemens SITRANS F Series, Руководство по эксплуатации, Страница: 306 / 362

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