YOKOGAWA DPharp EJX***A Series, Руководство пользователя

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<3. Parameter Setting>
3-24
IM 01C25T01-06EN
3.3.13 Status Output (only for EJX series:
option code AL)
EJX
The transmitter has a contact output.
Select the type of output, status output, and set the
unit, value etc.
Please note that the status output function is not
a safety related function and it can not be used for
safety instrumented system applications.
(1) Setting of status output
This feature is used for a transistor output (open
collector) of an on/off signal according to the
status of high and low alarm limits, which are
user-configurable values as shown in subsection
3.3.12 Alarm. The status output can be assigned
as any combination of the high or low limits of the
input pressure, input static pressure, or capsule
temperature.
• Procedure to call up the display
DD and DTM
(excluding EJX_
HART 5[1.2])
[Root Menu] → Detailed setup
→Output condition → Process
Alerts → DO config → DO Select
EJX_HART 5
[1.2] DTM
Configuration → Process Alerts →
DO Select
Display Item Contents (Select a output variable
from the list below)
Off –
Pres Differential pressure
SP Static pressure
Temp Temperature
Pres/SP Pressure and static pressure
Pres/Temp Pressure and temperature
SP/Temp Static pressure and temperature
Pres/SP/Temp Pressure, static pressure and
temperature
Diag Alarm Alarm for advanced diagnostics
(Refer to subsection 4.2.2.5)
All Alarm for pressure, static pressure,
temperature, and advanced
diagnostics
NOTE
No status output signal has been defined for a
CPU failure or hardware error. Use a 4-20 mA
signal to indicate a transmitter’s failure.

Status output for higher alert value

Status output for lower alert value
F0309.ai
Output
(%)
Status output
Status output
*: 5% of setting span for differential pressure / pressure
Time (t)
Time (t)
Setting value
Setting value
5%* of hysteresis
Output
(%)
5%* of hysteresis
On Off
On
On
On
Off
Example: Status output operation of ON
WHEN AL. DETECT
Figure 3.2 Status Output
(2) Selecting of output signal
Status output can be selected for the contact
output.
• Procedure to call up the display
DD and DTM
(excluding EJX_
HART 5[1.2])
[Root Menu] → Detailed setup
→Output condition → Process Alerts
→ DO config → DO Signal type
EJX_HART 5
[1.2] DTM
Configuration → Process Alerts →
DO Signal type
ON WHEN AL.
DETECT
Output is “ON” when alert is detected
OFF WHEN AL.
DETECT
Output is “OFF” when alert is
detected
CAUTION
Whenever turning on the transmitter or detecting
the short interruption, check if contact output
correctly reflects the alarm status and test
the ON/OFF action of contact output by the
parameter DO test to confirm that the contact
output operates correctly.