Rockwell Automation Publication 1444-UM001D-EN-P - June 2018 277
Operate the Module Chapter 10
Alarm Status Structure
The alarm status structure consists of an array of 13 records (Table 6 7 ) that
present the status of associated voted alarms.
If Alarm Status Alignment is Dynamic, then status records are also assigned to
relays that are configured to act only on fault, and to any unused (not enabled)
relays.
See Alarm System Overview
on page 211 and Alarm Status Alignment on
page 212 for further information on how Alarm Statuses are associated with
Voted Alarms and Relays.
Module status excludes an assembly for each measurement alarm. The status of
a measurement alarm that is referenced by a voted alarm is included in the
alarm status record that is associated with the voted alarm.
The status structure consists of the parameters that are shown in Tab le 6 8
.
Alarm Status to Relay and Voted Alarm Association
How Alarm Statuses (Figure 94) are allocated and assigned to voted alarms and
relays varies with the selected method of alignment. (See Table 15 on page 98
).
The two methods of aligning the Alarm Status, Dynamic (default) and Static,
are described in Alarm Status Alignment
on page 212, and in this section.
ExpTachSpeed0Uncertain
Tachometer Signal Conditioner Speed 0 Uncertain
Speed 0/1 is less than previous measured. Reported speed is estimated until a further pulse is detected,
or until zero speed is determined (maximum pulse wait time exceeded).
ExpTachSpeed1Uncertain
Tachometer Signal Conditioner Speed1 Uncertain
ExpTachInput0Fault
Tachometer Signal Conditioner Speed 0 Fault
Tacho sensor fault. Indicates bias out of range and/or speed out of range and/or TSCX module fault.
ExpTachInput1Fault
Tachometer Signal Conditioner Speed 1 Fault
Tag (continued) Description (if = 1)
DINT AlarmStatus[13]
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