Yokogawa EJX440A - Manual (Page 37)

<3. Operation>
3-27
IM 01C25T01-01E
3.5.15 Process Alarm
The function is used to display the alarm codes
when the input pressure exceeds the specified
value within the calibration range. The same is
available for the input static pressure and the
capsule temperature on the pressure sensor. Refer
to table 4.3.1 Alarm Message Summary for the
specific alarm code to be generated.
F0347.ai
(ENTER)
EJX:
Pres Alert mode
Off
Off
Hi. Al Detect
Lo. Al Detect
Hi/Lo. Al Detect
HELP DEL ESC ENTER
Select Hi. Al Detect, and press
ENTER (F4).
1. Device setup
4. Detailed setup
3. Output condition
4. Process Alerts
1. Pres Alert mode
Example: Set the alert mode from OFF to Hi. Al Detect for
the input pressure.
EJX:
Process Alerts
1 Pres Alert mode
2 Config Pres Alerts
3 SP Alert Mode Off
4 Config SP Alerts
5 Temp Alert Mode
HELP SEND HOME ENTER
Press SEND (F2) to send the data
to the transmitter, then check to
confirm that disappears.
(SEND)
SEND
1
2
F0348.ai
(ENTER)
EJX:
Hi Alert Val
100.000 kPa
75
HELP DEL ESC ENTER Enter 75, and press ENTER (F4).
1. Device setup
4. Detailed setup
3. Output condition
4. Process Alerts
2. Config Pres Alerts
1. Hi Alert Val
Example: Set the higher alert value of 75 for alarm
generation.
EJX:
Config Pres Alerts
1 Hi Alert Val
2 Lo Alert Val
3 LSL -100.000 kPa
4 USL 100.000 kPa
HELP SEND HOME ENTER
Press SEND (F2) to send the data
to the transmitter, then check to
confirm that disappears.
(SEND)
SEND
1
2
‘ 75 ’
NOTE
When option code /DG6 is specified, Diag can
be also assigned to Status. The Hi Alert Val or
Lo Alert Val for Diag is defined by the following
parameters.
[Impulse Line Blockage Detection]
Limit meters to detect the blockage and
Condition error for ILBD operation is defined.
Refer to 4.2.2.1.
[Heat Trace Monitoring]
Flg temp Hi Alert Val and Flg temp Lo Alert
Val parameters are used as the upper and
lower threshold for Status output. Refer to
4.2.3.2.
3.5.16 Status Output (option code AL)
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 3.5.15 Process
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.
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.
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.