Rockwell Automation 1758-RTU202 DataSite Software User Manual FRN 1.2 - Manual (Page 162)

Publication 1758-UM002D-EN-P - October 2010
162 DataSite Flow Configuration Utility (DS FloConfig)
Fixed variables are:
• DP/PI: Differential pressure/Pulse count
• P: Pressure
• T: Temperature
• Hi Limit: the high limit of the alarm
• Lo Limit: the low limit of the alarm
• Dead Band: the dead band of the alarm
When the signal variable exceeds the Hi Limit, a high limit alarm will occur,
and the value in the alarm event is the current value of the signal.
In the case of a high limit alarm, if the value of the detected current signal is
less than the high limit of the alarm minus the dead band of the alarm, the high
limit alarm disappears.
When the signal variable is less than the Lo limit of the alarm, a low limit alarm
will occur, and the value of the alarm event is the current value of the signal.
In the case of a low limit alarm, if the value of the detected current signal is
more than the low limit of the alarm plus the dead band value, the low limit
alarm disappears.
IMPORTANT
If the current flow meter is AGA3, set the Hi Limit, Lo
Limit, and Dead Band of the DP (differential pressure).
If it is AGA7, set the Hi Limit, Lo Limit, and Dead Band of
the PI (pulse count).