<7. Setting Parameters>
7-9
IM 01W03D01-01EN
7.3.7 Assignment to AI Object
FN310 has four AI blocks. Input value of Process
Value parameters for each AI block depends
on the setting of the Sensor Type parameter of
TRANSDUCER block.
Table 7.3
HART Data Conversion
AI
Object
TRANSDUCER.Sensor Type
0 : HART Device
1 : No Sensor
AI1
Primary Value of
HART devices
UAPMO.EnergyLeft *
AI2
Secondary Value of
HART devices
Not Assigned
AI3
Tertiary Value of
HART devices
Not Assigned
AI4
Quaternary Value of
HART devices
Not Assigned
*: Disabled by default
7.3.8 Write Protect
Hardware write protection and software write
protection functions are available for FN310. The
write protection status is displayed on the LCD.
Refer to subsection 6.4 “Display Contents of the
Integral Indicator” for details.
Hardware Write Protection
Hardware Write Protection is set by slide switch on
the front panel back.
Software Write Protection
Software Write Protection is set by the parameter
of software write protect of UAP Option in UAPMO
block.
For the relationship between hardware write
protection and software write protection, refer to
section 9 “Parameter Summary”.
Table 7.2
HART Data Conversion
Item
HART
ISA100.11a
Remarks
String
Packed ASCII
ASCII
Holds the converted value for
the following parameters of IFO
object.
Tag Name
Description
Transmitter Message
Unit Code
Engineering Unit Code
(1 - 169, 220 - 239)
Convert to 1000-1717 according
to FF FN-21
Holds the converted value for
the following parameters of IFO
object.
AI1.Scale.EU.Unit
AI2.Scale.EU.Unit
AI3.Scale.EU.Unit
AI4.Scale.EU.Unit
Unicode expanded area
(170 - 219)
Convert to 1588 (No Units)
Manufacturer specific definition
(240 - 249)
User defined unit
(250 - 253)
HART Data Conversion
There are different encoding in some fields that
are defined in the ISA100.11a and HART. FN310
converts into ISA100.11a encoding when mapping
parameters to IFO block. Table 7.2 shows the
conversion method.
HART data conversion is only applicable to
HART Command of transmitting from the FN310.
HART Command sent from the host system is not
converted.
