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Alarm object (class id 31dh), Class attributes, Instances – Rockwell Automation 1440-VST02-01RA XM-120 Eccentricity Module User Manual

Page 102: Instance attributes, Class attributes instances instance attributes, Alarm object (class id 31d

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Publication GMSI10-UM010C-EN-P - May 2010

94 DeviceNet Objects

Alarm Object
(Class ID 31D

H

)

The Alarm Object models a two-stage (alert and danger levels) alarm.

Class Attributes

The Alarm Object provides no class attributes.

Instances

There are 2 instances of this object.

Instance Attributes

Table C.30 Alarm Object Instance Attributes

Attr ID

Access
Rule

Name Data

Type

Description

Semantics

3

Get

Alarm Status

3 BITS

The current status of the
alarm.

0 = Normal
1 = Alert (alarm)
2 = Danger (shutdown)
3 = Disarm
4 = Xdcr Fault
5 = Module Fault
6 = Tachometer Fault

4

Get/Set

Alarm Enable

BOOL

Indicates whether this
alarm object is enabled.

0 = Disabled
1 = Enabled

6

Get

Threshold Units

USINT

Indicates whether the
threshold and hysteresis
value are specified in
units of measure.

Set to 1
1 = Measurement units

7

Get/Set

Condition

USINT

Indicates on which side of
the threshold values the
alarm and danger
conditions exist.

0 = Greater than
1 = Less than
2 = Inside range
3 = Outside range

8

Get/Set

Alert Threshold
(High) (Clockwise)

REAL

The threshold value for
the alert (alarm) condition
(greater threshold for
range types).

9

Get/Set

Danger Threshold
(High) (Clockwise)

REAL

The threshold value for
the danger (shutdown)
condition (greater
threshold for range types).

10

Get/Set

Alert Threshold
Low
(Counterclockwise)

REAL

The lesser threshold value
for the alert (alarm)
condition for the range
condition types.