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Rockwell Automation 9301 Series RSView32 Users Guide User Manual

Page 129

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Configuring alarms

6–3

Example: Alarm thresholds

The illustration shows the changing values of a tag monitoring a
motor’s revolutions per minute (rpm). With the threshold settings
illustrated, the motor must run between 2,000 rpm and 3,000 rpm, or
an alarm is triggered. In the illustration, an X shows when the tag goes
into alarm and an O shows when the tag goes out of alarm.

Safe zone

5,000

4,000

3,000

2,000

1,000

1

Thresholds

Threshold

values

Alarm

security

levels

Time

*

*

Increasing

Decreasing

6

5

4

3

2

1

1

4

8

8

6

4

Thresholds must be set up

in ascending order

*

These alarms are triggered only if the check

box ‘Generate alarms when approaching

normal operating range’ is selected in the

Alarm Setup dialog box.

If the motor speed

It triggers an alarm of this severity

exceeds 3,000 rpm

8

exceeds 4,000 rpm

4

exceeds 5,000 rpm

1

falls below 5,000 rpm *

4

falls below 4,000 rpm *

8