Table 20: Device Variables - Honeywell SLG 700 User Manual

Device Variables
Product Level
Product Level %
Distance to Product
Product Level rate
Product Volume
Vapor Thickness
Vapor Thickness %
Vapor Volume
Interface Level
Interface Level %
Distance To Interface
Interface Level Rate
Upper Product
Thickness
Lower Product Volume
Upper Product Volume
In addition to the Device Variables, the HART protocol has a concept of Dynamic Variables which
allow up to four Device Variables to be configured for possible connection to an analog output
channel and for access by a smaller more widely implemented command set.
These Dynamic Variables are referred to as:

Process Variable (PV)

Secondary Variable (SV)

Tertiary Variable (TV)

Quaternary Variable (QV)
Of the variables, the PV is unique as it is always assigned to the analog output channel that drives
the loop current which may be monitored by the control system.
Page 86

Table 20: Device variables

Device
Variable
code
0 ft, in, m, cm, mm
1 %
2 ft, in, m, cm, mm
3 ft/s, m/s, in/min, m/h, ft/min, in/sec
4 ft
5 ft, in, m, cm, mm
6 %
7 ft
8 ft, in, m, cm, mm
9 %
10 ft, in, m, cm, mm
11 ft/s, m/s, in/min, m/h, ft/min, in/sec
12 ft, in, m, cm, mm
13 ft
14 ft
SLG 700 Series HART Option User's Manual
Supported Units
3 3
, in , US gal, Imp gal, barrels, yd
3 3
, in , US gal, Imp gal, barrels, yd
3 3
, in , US gal, Imp gal, barrels, yd
3 3
, in , US gal, Imp gal, barrels, yd
3 3
, m , liters, bbl liq
3 3
, m , liters, bbl liq
3 3
, m , liters, bbl liq
3 3
, m , liters, bbl liq
Revision 5