Yokogawa digitalYEWFLO (DY) - Manual (Page 75)

<9. OPERATION VIA HART CONFIGURATION TOOL (HART 7)>
9-3
IM 01F06A00-01EN
9.6 Parameter Setting
The parameter structure of the HART confi guration
tool is hierarchical.
Refer to Section 9.11 “Menu Tree (HART 7)” for the
corresponding parameters. The menu tree shows
a cross-reference of the parameters for HART
confi guration Tool and BRAIN Terminal.
Refer to Section 6.4 “Parameters Description” for
the functions of parameters.
Note that some display parameters of
digitalYEWFLO are different from those of HART
Confi guration Tools.
9.7 Data Renewing and Upload/
Download function
(1) Data renewing
Following data are renewed in 0.5 to 2 seconds
cycle.
PV, PV%, rnge, Loop Current, Total
Temp, TV% rnge, : only for /MV
(2) Upload/download function
Upload/download parameters from
digitalYEWFLO to the HART Confi guration
Tool.
Refer to Section 9.11 “Menu Tree (HART 7)” for
the applicable parameters.
9.8 Self-Diagnostic
The self-diagnostic function of the digitalYEWFLO
is explained in Section 6.5 “Self-Diagnostic (Error
Code List)”.
The followings are additional items of the self-
diagnostic function.
• Burst confi guration error: Burst mode setting
error.
• Device variable simulation: Executing Device
variable simulation function.
The HART confi guration tool is able to execute
METHOD (*) of 'Self test/Status'. Confi rm the error.
• Procedure to call up the Self test/Status;
[Root Menu] → Diag/Service → Self test/Status
(*) ‘Method’ is a program to faciliate the parameter settings.
9.9 Software Write Protect
digitalYEWFLO confi gured data is saved by using
a write protect function. The write protect status is
set to “Yes” when 8 alphanumeric characters are
entered in the New password fi eld and transferred
to the device. When write protect is set to “Yes,”
the device does not accept parameter changes.
When the same eight alphanumeric string entered
in the New password fi eld is also entered in the
Enable wrt 10min fi eld and transferred to the
digitalYEWFLO, it will be possible to change device
parameters during a 10 minute period.
To change the digitalYEWFLO from the write
protect “Yes”status back to Write protect “No”
status, use Enable wrt 10min to fi rst release the
write protect function and then enter eight spaces in
the New password fi eld.
9.10 Specifi c Functions of HART
Confi guration Tool
9.10.1 Process Variable Setup (Dynamic
Variables)
The device deals with four data (fl ow rate,
temperature, density and total fl ow rate). In case of
/MV, these four data are allocated to PV(Primary
Variable), SV(Secondary Variable), TV(Tertiary
Variable) and QV(Quaternary Variable). The
variable of PV is 4 to 20mA current output.
Therefore, the total fl ow rate do not allocate to PV.
(Except /MV, each dynamic variables are fi xed at
factory setting.)
Dynamic
Variable
Choice items
Factory
Setting
PV Flow rate, Temperature Instantaneous
Flowrate
SV Flow rate, Total, Temperature, Density Total Flowrate
TV Flow rate, Total, Temperature, Density Fluid
Temperature
QV Flow rate, Total, Temperature, Density Fluid Density
• Procedure to call up the Dynamic variable
assignments.
[Root Menu] → Detailed setup → Confi gure
outputs → HART output →
Dynamic variable assignments ĺ PV is
ĺ SV is
ĺ TV is
ĺ QV is
ĺ Chng dyn var assign
(METHOD)
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