Allen-Bradley 1444-TSCX02-02RB User Manual page 225

Table 47 - Voted Alarms (continued)
Parameter Name
Output Tag Gate Control
Output Tag Override Control
Relay Control – Fail-Safe Enable
Relay Control – Latch Enable
Values
Select Off, Alarm Control 0 or Alarm Control 1
Select Off, Alarm Control 0 or Alarm Control 1
Checked (1) / Unchecked (0)
Checked (1) / Unchecked (0)
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
Configure Alarms
Comments
Enables a control to be used to manage the enabling
(control set) and the disabling (control unset) of the Voted
Alarm.
Control inputs are normally implemented using one of the
two Alarm Control output tags (control 0 = bit 5, control 1
= bit 6). Alternatively, control can be provided using either
of the discrete inputs (See Hardware Configuration on
page 112).
Enables a control to be used to manage activating a Voted
Alarm, regardless of other definition and the state of any
defined measurement alarm inputs. If defined, when the
selected control is set, the voted alarm actuates. The
capability can provide either of:
• A means to test the relay / output behavior of the voted
alarm without having to satisfy the defined alarm
conditions.
• A means to use the controller to manage associated
relays directly. In this condition, the remainder of the
voted alarm definition is inconsequential as it is used
only to map relays for direct controller management.
Control inputs are normally implemented using one of the
two Alarm Control output tags (control 0 = bit 5, control 1
= bit 6). Alternatively, control can be provided using either
of the discrete inputs (See Hardware Configuration Page
on page 111).
Check to enable Fail-Safe for any relay that is assigned to
this Voted Alarm.
Fail-Safe Relay Coil Status
Behavior
In Alarm
Non-Fail-Safe energized
Fail-Safe de-energized
Fail-Safe is applicable only to physical relays that are
assigned to the Voted Alarm.
Fail-Safe is used to help make sure that if a loss of power
occurs to the relay that it fails in a 'safe' state. The safe
state is generally the same as the Alarm state.
Check to enable Latching on this Voted Alarm.
Latching is applied to the Voted Alarm and is extended to
any relays that are assigned to the alarm.
A latched Voted Alarm (and associated relay) can be reset
after the alarm condition has cleared. Set the AlarmReset
bit (bit 7) in the controller Control tag output, or if a
discrete input is assigned this function, then by signaling
that input. (See Hardware Configuration Page on
page 111).
Chapter 8
Not in Alarm
de-energized
energized
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