Siemens SITRANS F Series Operating Instructions Manual page 148

Modbus communication
B.3 Modbus holding registers tables
Table B-5 Mass flow
Modbus ad‐ Data type /
dress Size [bytes]
2125 Float / 4
2426 Float / 4
: See Sensor dimension dependent default settings (Page 128)
1)
Table B-6 Volume flow
Modbus ad‐ Data type /
dress Size [bytes]
2170 Float / 4
: See Sensor dimension dependent default settings (Page 128)
1)
Table B-7 Density
Modbus ad‐ Data type /
dress Size [bytes]
2127 Float / 4
2129 Unsigned /
2
148
Parameter Description
Low Mass flow Cut- Set mass flow limit for low
Off flow cut-off.
Below this limit mass flow
output is forced to zero.
If Low Flow Cut-Off is set to
0, the cut-off functionality is
disabled.
Notice:
It is recommended to set a
lower value for gas applica‐
tions.
Mass flow Correction Specify correction factor for
Factor use in the mass flow calcula‐
tion
Parameter Description
Low Volume flow Cut Define the numerical volume
Off flow value below which the
volume flow output is forced
to zero.
Parameter Description
Empty Tube Limit Define threshold value of
empty tube
Empty Tube Detec‐ Set automatic detection of
tion Empty Tube On/Off
0 = off (Empty tube is off).
1 = on (a density value below
Empty Tube Limit triggers an
alarm. All flow rate values
are forced to zero %).
Default value Value range Access
[unit]
Sensor size 0 to 1023
specific [kg/
s]
1)
1 -1.999 to
+1.999
Default value Value range Access
[unit]
Sensor size 0 to 0.177
specific
[m /s]
3 1)
Default value Value range Access
[unit]
500 [kg/m ] -14 000 to
3
+14 000
0 0 to 1
Operating Instructions, 01/2019, A5E44036384-AB
level
Read /
Write
Read /
Write
level
Read /
Write
level
Read /
Write
Read /
Write
SITRANS FC310