Yokogawa EJX930A - Manual (Page 39)

<3. Parameter Setting>
3-28
IM 01C25R02-01E
NOTE
The output process value while simulation
can be monitored by LCD and through
communication as follows.
Process value Output value
DP Simulation value according to
simulation mode
SP Simulation value according to
simulation mode
ET Simulation value according to
simulation mode
Flow Rate Flow calculation value using the
DP, SP, ET simulation value
Total Flow Flow Rate accumulation value
Following function is reflected to flow calculation
while simulation.
Simulation
value
Function
DP/SP/ET Measuring Range (LRV/URV)
Alarm
Status Output
Damping Time*
DP Low Cut Mode
*: When “Check Flow Calc” is selected, damping is ignored.
If one of the following alarm occurs while
simulation, all of the output data are held to the
value before alarm occurs.
AL.01 (CAP. ERR)
AL.02 (AMP. ERR)
AL.03 (ET. ERR)
(4) Device Variable Simulation Function
(Effective only when setting to HART 7)
Using the simulation function, the output signal can
be confirmed by setting any value and status to the
selected device variable.
Call up the parameter and follow the message
shown.
After completing the step 5, the simulation starts.
Integral indicator shows output and alarm (AL.91)
alternately.
• Procedure of device variable simulation
Step 1 Call up the
parameter
[Root Menu] → Diag/
Service → Test → Simulate
2 Selection of
Device Variable
Select one parameter from
the list below
Off
Flow
Pres
SP
ET
Total Flow
PV
SV
TV
QV
% 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 flow rate is calculated from differential
pressure, static pressure, and external
temperature, and the total flow is
accumulated from the flow rate. Therefore,
the simulation results for the flow rate and
total flow depend on the simulation settings
of differential pressure, static pressure, and
external temperature. The total flow depends
on the flow rate as well.
• The total flow simulation is only applied for
LCD display and communication output and
does not affect the total flow value.
• All the simulations for differential pressure,
static pressure, external temperature,
flow rate are reflected to the output.
Accordingly, the loop current, LCD display,
and communication output are directly
corresponded to the simulate value.
The alarm output is also available according
to the simulate value.
• Damping is applicable for differential
pressure, static pressure, and external
temperature simulation.