Siemens SITRANS F Series, Руководство по эксплуатации, Страница: 175 / 362

Modbus communication
A.9 Modbus holding registers tables
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
Operating Instructions, 08/2017, A5E37367739-AC
173
Multipoint calibration
Table A- 28 Multipoint calibration
Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units regis-
ter)
Value range /
Setting options
Access
level
1051 Unsigned / 2 Protect calibra-
tion table
Specifies protection of
the multipoint calibra-
tion table
0
• 0 :No protection of
the calibration table.
End users can use
Calibration table
command (1064) to
change the multipoint
calibration table.
•
1: Calibration table is
protected. Calibration
table command
(1064) will not grant
access to modify the
multipoint calibration
table.
Read /
write
(Expert)
1052 Unsigned / 2 Enable mul-
tipoint calibra-
tion
Enable or disable the
Multipoint calibration.
0
•
0: Disabled
•
1: Enabled
Read /
write
1053 Unsigned / 2 Asymmetric
calibration table
Usage of the calibra-
tion table.
0
• 0: Unidirectional. All
20 calibration points
are used for positive
flow calibration and
are then mirrored for
negative flow.
•
1: Bidirectional. The
first 10 calibration
points are used for
positive flow calibra-
tion and the 10 last
calibration points are
used for negative
flow calibration.
Read /
write
(Expert)
1066 Float / 4 Calibration
point
Calibration point that is
to be transferred to the
multipoint calibration
table.
0.0
[m
3
/s]
(7500)
0.0 - 100000.0 Read /
write
1068 Float / 4 Calibration
value
Calibration correction
factor that is to be
transferred to the mul-
tipoint calibration table.
E. g. 0.99 = -1% cor-
rection.
1.0 0.5 - 2.0 Read /
write