Hart Variables - ADF Web HD67908-5-A1 User Manual

Industrial Electronic Devices

HART VARIABLES:

By Pressing the "HART Variables" button from the main window for SW67908 (Fig. 2) the window "Definition of HART Variables List"
appears (Fig. 4).
This section is used to define the HART variables to read/write with the Modbus Master.
Figure 4: "HART Variables" window
The means of the fields are:
If the field "Enable" is checked, the HART variable is enabled;
In the field "Device Address" the address of HART device is defined;
In the field "Preamble
If the field "Type" the type of HART parameter is defined;
In the field "Var/Cmd
numbers are:
246: Primary Variable;
o
247: Secondary Variable;
o
248: Tertiary Variable;
o
249: Quaternary Variable.
o
ADFweb.com S.r.l.
Count" the number of bytes for the synchronization is defined;
Number" the identification of variable/command to read/write is defined. From HART standard, the most used
User Manual Modbus Slave / HART Master
Document code: MN67908_ENG Revision 1.001 Page 19 of 32