Omron E5*C Series User Manual page 140

3 Part Names and Basic Procedures
Set
Alarm type
value
Absolute-value
8
upper-limit
alarm
Absolute-value
9
lower-limit
alarm
Absolute-value
10
upper-limit
alarm with
standby
sequence
Absolute-value
11
lower-limit
alarm with
standby
sequence
Loop Burnout
12
Alarm (LBA)
(Valid only for
alarm 1 on a
Standard
Model.)
3 - 18
Description
The alarm output is ON while the
PV is equal to or higher than the
alarm value.
The alarm output is ON while the
PV is equal to or lower than the
alarm value.
This alarm provides a standby
sequence.
The alarm output is ON while the
PV is equal to or higher than the
alarm value.
This alarm provides a standby
sequence.
The alarm output is ON while the
PV is equal to or lower than the
alarm value.
The alarm output turns ON when
the control loop is broken.
Operation
Example:
ON
OFF
0
Upper-limit alarm
point (e.g., 100°C)
Alarm value (e.g., 100°C)
Example:
ON
OFF
0
Lower-limit alarm
point (e.g., 100°C)
Alarm value (e.g., 100°C)
Example:
ON
OFF
0
Upper-limit alarm
point (e.g., 100°C)
Alarm value (e.g., 100°C)
Example:
ON
OFF
0
Lower-limit alarm
point (e.g., 100°C)
Alarm value (e.g., 100°C)
There is assumed to be a loop burnout alarm if
the control deviation (SP − PV) is greater than
the threshold set in the LBA Level parameter
and if the PV is not reduced by at least the
value set in the LBA Band parameter within a
specific period of time. The LBA detection time
and LBA band are set in parameters.
PV
SP
LBA band
LBA detection time
MV
100%
0%
LBA Alarm Output
ON
OFF
E5@C Digital Temperature Controllers User's Manual (H174)
Temperature
Temperature
Temperature
Temperature
LBA level
Time
Time
Time