Yokogawa digitalYEWFLO (DY) - Manual (Page 81)

<9. OPERATION VIA HART CONFIGURATION TOOL (HART 7)>
9-9
IM 01F06A00-01EN
(3) Communication when set in the multidrop
mode.
• The HART confi guration tool searches for a
device that is set in multidrop mode when it is
turned on. When the HART confi guration tool
is connected to the device, the polling address
and the tag will be displayed.
• Select the desired device. After that, normal
communication to the selected device is
possible. However, the communication speed
will be slow.
(4) Release the Multidrop Mode
To release multidrop mode, call up the Poll
addr display and set the address to “0”.
Return Loop current mode to Enable.
9.10.5 Loop Test, Simulation, and Squawk
(1) Loop test
This feature can be used to output a fi xed current
for loop checks.
• Procedure to call up the Loop test (Method)
[Root Menu] → Diag/Service → Loop test
(2) Device Variable Simulation Function
(Effective only when setting to HART 7)
Using the simulation function, the output signal can
be confi rmed by setting any value and status to the
selected device variable.
Call up the parameter (Method) and follow the
message shown.
After completing the step 5 in the next table, the
simulation starts.
• Procedure of device variable simulation
step1
Call up the
parameter [Root Menu] → Diag/Service →
Simulate (M)
2 Selection of
Device Variable Select one parameter from the list
below
Off
Flow rate
Total
Temperature
Density
Percent range
Loop Current
3 Setting of Value Input the simulate value
4 Setting of Data
quality Select one parameter from the list
below
Bad
Poor accuracy
Manual / Fixed
Good
5 Setting of Limit
status Select one parameter from the list
below
Not limited
Low limited
High limited
Constant
NOTE
• The simulations act on current, LCD display,
communication and alarm.
• The simulation of total fl ow rate acts on
LCD display and communication, not on
measuring total fl ow rate.
The measuring total fl ow rate is continuosly
working during simulation.