Table of Contents
Advertisement
5.2.4.12.2.2 Deviation Band Alarm
A deviation band alarm pre-sets two reference levels relative to set point. Two types of deviation
band alarm can be configured for alarm 1 and alarm 2. These are deviation band high alarm (A1FN or A2FN
select DB.HI) and deviation band low alarm (A1FN or A2FN select DB.LO). A1SP and A1HY are hidden if
alarm 1 is selected with deviation band alarm. Similarly, A2SP and A2HY are hidden if alarm 2 is selected
with deviation band alarm. Trigger levels of deviation band alarm are moving with set point.
For alarm 1, trigger levels=SP1± A1DV.
For alarm 2, trigger levels=SP1 ±A2DV.
One of 4 kinds of alarm modes can be selected for alarm 1 and alarm 2. These are Normal
alarm, latching alarm, Holding alarm and Latching/Holding alarm.
5-8 Latching/Holding Deviation Alarm
5-9 Normal Deviation Band Alarm
5-10 Latching Deviation Band Alarm
Page 144 of 479
Advertisement
Table of Contents
