Omron E5AN-H User Manual page 137

Loop Burnout Alarm
Determining the LBA
Detection Time
1,2,3...
LBA Level
LBA Band
Operating Procedure
Operation Level
PV/SP
C
25.0
100.0
Initial Setting Level
Input Type
in-t
5
Initial Setting Level
Alarm 1 Type
alt1
2
116
• To manually set the LBA detection time, set the LBA Detection Time
parameter to twice the LBA reference time given below.
1. Set the output to the maximum value.
2. Measure the time required for the width of change in the input to reach the
LBA band.
Measurement time
Tm
Temperature
LBA detection time = Tm × 2
3. Set the LBA Detection Time parameter to two times the measured time.
• Set the control deviation when the control loop is working properly.
• The default is 8.0 (°C/°F) for a temperature input and 10.00% FS for an
analog input.
• There is assumed to be an error in the control loop if the control deviation
is greater than the threshold set in the LBA Level parameter and if the
control deviation does not change by at least the value set in the LBA
Band parameter.
• The default is 3.0 (°C/°F) for a temperature input and 0.20% FS for an
analog input.
Perform the following procedure to use the loop burnout alarm.
In this example, the LBA detection time is set to 10, the LBA level is set to 8.0,
and the LBA band is set to 3.0.
1. Press the O Key for at least three seconds to move from the operation
level to the initial setting level.
2. Select the Alarm 1 Type parameter by pressing the M Key.
Section 4-12
PV
LBA band
MV = 100%
Time