Rockwell Automation Publication 5000-UM005B-EN-P - November 2015 61
Current/Voltage/Temperature-sensing Analog Input Module Features (5069-IY4) Chapter 4
Process Alarms
Process alarms alert you when the module has exceeded configured high or low
limits for each channel. The following are the user-configurable, alarm
trigger points:
• High high
• High
• Low
• Low low
To use the Process Alarms, you must complete the following tasks:
• Enable the alarms
• Configure the trigger points
Enable Process Alarms
When the module tags are created, the Process Alarm tags are disabled by default.
To see where to enable Process Alarms for the 5069-IY4 module, see
page 97.
Configure Alarm Trigger Points
You must configure the Process Alarm with a trigger point. That is, set values in
Engineering Units that, once the signal reaches the value, the alarm is triggered.
Process Alarm trigger points are related to the Scaling parameters that you
configure for the channel. The Engineering Units that are established in Scaling
determine the Process Alarm trigger points. That is, the available trigger point
values can be in signal units or engineering units.
For example, consider a channel that uses the Current (mA) input type, the
4 mA…20 mA input range, and scales the High and Low Engineering values of
100 and 0, respectively. The available Process Alarm values range from 0…100.
In this case, if the High Limit alarm is set to 50 EU, when the input signal reaches
12 mA, the High Limit alarm is set. The alarm is set because Scaling was
configured for Percentage of Full Scale and a signal value of 12 mA is 50% of the
full scale of engineering units.
To see where to set the Process Alarm trigger points for the 5069-IF8 module, see
page 97.
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