Alarms -2 – Yokogawa FVX110 User Manual
Page 65
<9. In-Process Operation>
9-2
IM 01S01C01-01EN
An alert has following structure:
Table 9.1
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
el
d
Di
ag
no
st
ic
A
le
rt
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
9.2.3 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_3 resource block parameters in
their default setting are categorized as described
in “NAMUR NE-107 Alarm Categories” in the
DEVICE_STATUS table in section 11.1. 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
9.2.