Yokogawa EJA115 - Manual (Page 34)

IM 01C22T03-00E 7-3
7. IN-PROCESS OPERATION
*1: Table 7.2 Fail Safe Mode
Value
Status (Quality)
Value
Status (Quality)
Value
Status (Quality)
Output Value and Status (Quality)
Fail Safe Default
Value
UNCERTAIN
Substitute Value
Last stored valid
OUT value
UNCERTAIN Last
Usable Value
wrong calculated
value
BAD_*(* as
calculated)
0
Default value is
used as output
value
1
Storing last valid
Output value
2
The calculated
output value is
incorrect
No. Fail Safe Mode
T0702.EPS
7.3 Simulation
The simulation function simulates the input of the AI
block and lets it operate as if the data were received
from the transducer block.
When the simulation parameter is set to “enable”, the
applicable AI block uses the simulation value set in
this parameter instead of the data from the transducer
block.
Table 7.3 Simulation parameter
Simulation
Control the simulation function of
this block
Disabled(standard) or
Enabled(simulation)
Simulation Value
Sets the value of the data to be
simulated.
Simulation Quality
and Status Sets the data status(quality) to be
simulated
Parameters Description
T0703.EPS
In simulation enabled status, an alarm (AL.62) is
generated from the physical block, and other device
alarms will be masked; for this reason the simulation
must be disabled immediately after using this function.
NOTE
Fail safe mode function has a priority over
simulation function. In this case, value and
status setting by fail safe mode output.
The Setting procedure is as follows;
Example: Simulation Quality: Good, Status: OK,
Output Value: 50 (%)
( Scale In: 0 to 100kPa, Out Scale: 0 to
100kPa)
From the DTM-Works window, click [Device]
→
[Connect]
Click [Device]
→
[Parameter]
→
[Online]
Double-click on [Output] folder
→
Click on [Analog
Input 1] folder
Change Simulation to [Enabled]
Change Simulation Value to [50] (%)
Change Simulation Quality to [Good]
Change Status to [OK]
The output value is displayed in the Output Value
field.
Change Simulation to [Disabled].
Figure 7.2 Simulation