Igure 3.8 Deviation Band Alarm 1 Operation - Brainchild P41 User Manual

: A deviation band high/low alarm presets two trigger levels
relative to set point value. The two trigger levels are SV+ASP1 and
SV-ASP1 for alarm. When the process is higer than SV+ASP1 or
lower than SV-ASP1, a deviation band alarm occurs. When the
process is within the trigger levels SV+ASP1-A1HY and SV-ASP1+
A1HY (where ASP1 must be positive value ). Figuree 3.8 shows the
deviation band alarm 1 opertion.
Output 2 on
off
Output 2 on
off
Figure 3.8 Deviation band alarm 1 operation Figure 3.8 Deviation band alarm 1 operation
The above description is based on alarm 1 which is selected for
output 2, the operations of alarm 2 and alarm 3 are same as alarm1.
In the above description SV denotes the current set point value for
control which is different from SP1 as the profile mode is performed.
Process value
Alarm value
Alarm value
UM0P411A
SV+ASP1
SV+ASP1-A1HY
SV(set point value)
SV-ASP1+A1HY
SV-ASP1
OUT2=ALM1
OUT2=rAL1
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