Siemens SITRANS FST030 - Page 177

Modbus
register
Data type /
Size in bytes
Parameter Description Default value
[units]
(units register)
Value range /
Setting options
Access
level
1068 Float / 4 Calibration val‐
ue
Calibration correction
factor that is to be trans‐
ferred to the multipoint
calibration table. E. g.
0.99 = -1% correction.
1.0 0.5 - 2.0 Read /
write
1064 Unsigned / 2 Calibration ta‐
ble command
The register "Multipoint
calibration status" is up‐
dated after each com‐
mand has been han‐
dled.
Command 21 will al‐
ways be accepted.
Remaining commands
will only be accepted if
register "Calibration ta‐
ble protection" is 0.
-
● 1..20: Transfer
calibration data
specified in registers
"Calibration point"
and "Calibration
value" to according
entry of the multipoint
calibration table.
● 21: Perform sanity
check of the
calibration table
(calibration point
values must be in
nominal ascending
order).
● 22: Reset calibration
table to default values
(all "Calibration point
X" values set to 0.0
and all "Calibration
value X" values set to
1.0).
● 23: Set register
"Asymmetric
calibration table" to 0
to indicate that the
calibration table is
used as a uni-
directional table.
● 24: Set register
"Asymmetric
calibration table" to 1
to indicate that the
calibration table is
used as a bi-
directional table.
Read /
write
Modbus communication
A.9 Modbus holding registers tables
SITRANS FST030 (Modbus)
Operating Instructions, 08/2018, A5E37367739-AD 177