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Modbus communication
A.9 Modbus holding registers tables
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
302
Operating Instructions, 08/2017, A5E37367739-AC
A.9.7
Diagnostics
A.9.7.1
Sensor
Sensor diagnostics
Table A- 95 Sensor diagnostics
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[unit]
(unit register)
Value range /
Setting options
Access
level
3302
Unsigned / 4 Frontend total
operating time
Operating time of
frontend in hours
-
[h]
-
Read
only
3304
Unsigned / 4 Frontend total
operating time
power-up
Operating of frontend
since last power-up
-
[h]
-
Read
only
3307
Float / 4
Reynolds num-
ber
Calculated Reynolds
number
-
-
Read
only
3319
Unsigned / 2 Path state
State of path 1-5.
Bit 0-1: Path 1
Bit 2-3: Path 2
Bit 4-5: Path 3
Bit 6-7: Path 4
Bit 8-9: Path 5
-
•
00: Not installed
•
01: Signal Search
•
10: Frequency
Search
•
11: Measurement
Read
only
Table A- 96 Path 1 diagnostics
Modbus
register
Data type /
Size in bytes
Parameter
Description
Default value
[unit]
(unit register)
Value range /
Setting options
Access
level
3400
Float / 4
RxGain up path
1
Rx gain of upstream
signal
-
-
Read
only
3402
Float / 4
RxGain down
path 1
Rx gain of downstream
signal
-
-
Read
only
3404
Float / 4
SNR upstream
path 1
Signal to noise ratio of
upstream signal
-
-
Read
only
3406
Float / 4
SNR down-
stream path 1
Signal to noise ratio of
downstream signal
-
-
Read
only
3408
Float / 4
Sound velocity
path 1
Sound velocity
-
-
Read
only
3410
Float / 4
Flow velocity
path 1
Flow velocity
-
-
Read
only
3412
Float / 4
Delta time path
1
Delta time
-
-
Read
only
3414
Float / 4
Travel time up
path 1
Travel time of up-
stream signal
-
-
Read
only