Yokogawa EJX115A - Manual (Page 42)

<7. In-Process Operation>
7-1
IM 01C25T04-01EN
7. In-Process Operation
This chapter describes the procedure performed
when changing the operation of the function block
of the transmitter in process.
7.1 Mode Transition
When the function block mode is changed to Out_
Of_Service, the function block pauses.
When the function block mode is changed to
Manual, the function block suspends updating of
output values. In this case alone, it is possible to
write a value to the OUT parameter of the block for
output.
7.2 Generation of Alarm
7.2.1 Indication of Alarm
When the self-diagnostics function indicates that a
device is faulty, a diagnostic message (DIAGNOSIS
or DIAGNOSIS_EXTENSION) is issued from the
physical block. When a diagnostic message is
detected in each function block or a diagnostic
message in the process value (process alarm) is
detected, a diagnostic message is issued from
each block. If an LCD indicator is installed, the error
number is displayed as AL.XX.
If two or more alarms are issued, multiple error
numbers are displayed.
For details of ALARM, refer to Section 8.2.
F0701.ai
Figure 7.1 Error Identification on Indicator
7.2.2 Status of Each Parameter in Failure
Mode
Status has Classic Status and Condensed Status.
Classic Status is a conventional alarm and does
not support the NAMUR NE107. Condensed Status
is an alarm which was added to PA Profile 3.01 or
later and supports the NAMUR NE107.
The following standard categories of instrument
diagnostics are defined for the NAMUR NE-107.
F (Failed):
An alarm category that indicates a failure has
occurred in the instrument or in its peripheral
devices.
C (Check Function):
An alarm category that indicates that a detected
failure is a temporary event.
S (Off Specification):
An alarm category that indicates that the
detected failure was caused by the
instrument being used outside of its range
or because a discrepancy has occurred
between the set value and measured
value. The alarm was caused either by the
instrument or process state.
M (Maintenance):
An alarm category for a detected failure that
has a low level of urgency but is a failure
that could develop into a problem causing
restrictions in instrument functionality in
some environments.
Classic Status and Condensed Status can be
switched by using the Condensed Status/Diagnosis
(PB.COND_STATUS_DIAG) parameter.
• Procedure to call up the display
DTM [Menu] → Device → Configulation →
Query Device → Query Device PB →
Condensed Status/Diagnosis
EDD [Menu] → Device → Query Device →
Phsical Block → Index 33-51 →
Condensed Status/Diagnosis