Yokogawa EJX930A - Manual (Page 54)

<7. In-Process Operation>
7-2
IM 01C25T02-01E
Table 7.1 Alert Object
Subindex
Parameter
Name
Explanation
A
na
lo
g
A
le
rt
D
is
cr
et
e
A
le
rt
U
pd
at
e
A
le
rt
Fi
eld
Di
ag
no
st
ic
Al
er
t
1 1 1 1 Block
Index
Index of block from
which alert is generated
2 2 2 2 Alert Key Alert Key copied from
the block
3 3 3 3 Standard
Type
Type of the alert
4 4 4 4 Mfr Type Alert Name identified by
manufacturer specific
DD
5 5 5 5 Message
Type
Reason of alert
notification
6 6 6 6 Priority Priority of the alarm
7 7 7 7 Time
Stamp
Time when this alert is
first detected
8 8 8 Subcode Enumerated cause of
this alert
9 9 9 Value Value of referenced data
10 10 10 Relative
Index
Relative index of
referenced data
8 Static
Revision
Value of static revision
(ST_REV) of the block
11 11 9 Unit Index Unit code of referenced
data
11 Source
Block
Index
Relative index of the
block that triggered the
alert
7.2.3 Standard categories for NAMUR NE-
107 instrument diagnostics alarms
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.
Alarms displayed by DEVICE_STATUS_1 to
DEVICE_STATUS_8 resource block parameters in
their default setting are categorized as described
in “NAMUR NE-107 Alarm Categories” in the
DEVICE_STATUS table in section 8.1. When an
alarm occurs, a character string that corresponds
to an alarm category is assigned to FD_*_ACTIVE
(index 1067 to 1070) [* indicates FAIL, OFF SPEC,
MAINT or CHECK]. (For example, an F category
alarm is assigned to FD_FAIL_ACTIVE) Similarly,
procedures for processing alarms are assigned
to FD_RECOMMEN_ACT. For details on alarm
displays and how to deal with them, refer to Table
7.2.
The DTM-based “Field Diagnostics” function on
FieldMate R2.06 or later makes configuration or
checking of alarm classified on NE-107 easier.
For the detailed usage of “Field Diagnostics”
function, refer to FieldMate user’s manual: IM
01R01A15-01EN.