YOKOGAWA YTA610, User Manual

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<3. Parameter Setting >
3-15
IM 01C50T01-02EN
(2) Auto Release Time
This parameter can be used to set the auto release
time of Loop Test and Simulation (See 3.5.14).
• Procedure to call up the display
Device setup → Diag/Service → Test Device →
Auto Release Time
Select from 10 minutes, 30 minutes, 60
minutes, 3 hours, 6 hours or 12 hours.
Default setting is 10 minutes.
NOTE
If the transmitter is equipped with the integral
indicator, the LCD displays F.O.
3.5.3 Burnout Function
(1) Sensor burnout
Configure the burnout mode in the case of sensor
failure or disconnection.
• Procedure to call up the display
Device setup → Basic setup → AO Basic Setup
→ AO Sensor BO Dir: Select High, Low, User
Config or Off.
→ AO Sensor BO Unit: Select mA or %
→ AO Sns BO Usr Val: Outputs user set value
within 3.6 to 21.6 (mA) or -2.5 to 110 (%)
When the sensor failure is detected, the
transmitter outputs one of the following values.
Low: Outputs 3.6mA
High: Outputs 21.6mA
User (mA): Outputs user set value in mA.
Settable within 3.6 to 21.6 mA.
User (%): Outputs user set value in %.
Settable within -2.5 to 110 %.
Off: The burn out output is NOT defined
CAUTION
There is a time lag between sensor failure and
sensor abnormality detection.
Since the failed measurement value is output,
the current output also becomes undefined.
When an error is detected, it becomes the output
set with this parameter.
However, when sensor burnout is set to OFF, it
may be held with indefinite measurement value,
so please understanding this point.
During sensor burn out time, any of AL.09, AL.10
to 13 or AL.22 alarm message is generated. (See
Chapter 4 for details.)
(2) Burnout in hardware failure
The output status of the transmitter in hardware
failure is set using a slide switch on the MAIN
assembly. The current setting can be checked in
parameter “PV Alrm type”.
• Procedure to call up the “AO Alrm type
parameter” display
Device setup → Basic setup → AO Basic Setup
→ AO Alrm typ
Hi: More than 110% output (21.6 mA)
Lo: Less than -5% output (3.2 mA)
3.5.4 Integral Indicator Display Mode
When an integral indicator is specified with the
transmitter, the display items and display cycle can
be configured.
(1) Process Variable Display
Process variables that can be displayed in YTA are
shown in the Table 3.1. A cycle of up to four displays
(Disp Out1, Disp Out2, Disp %, Disp mA) can be
shown by assigning variables to the parameters.
Indicate values of process variables with the
indication limits –99999 to 99999.
F0305.ai
P SP T F
%
Table 3.1 Process Variable Display
Process variable Disp Out1 Disp Out2
Sensor1
 
Sensor1 − Terminal
 
Terminal
 
Sensor2
 
Sensor2 − Terminal
 
Sensor1 − Sensor2
 
Sensor2 − Sensor1
 
Averege
 
Sensor Backup
 
PV
 
SV
 
TV
 
QV
 
Not used ─
