Autonics TM Series, User Manual

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6 Parameter Settings and Functions
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6.4.8.2 LBA Detection Band Settings
You can set the minimum value of deviation change to decrease during LBA monitoring
time. Automatically setting with auto-tunning.
Group Parameter Range
Factory
Default
Unit
Alarm Setting Group
LBA Band_Ch1,
LBA Band_Ch2
1~999
0.1~999.9
3
℃,℉
It checks control loop and outputs alarm by temperature change of the subject.
For heating control(cooling control), when control output MV is 100%(0% for
cooling control) and PV is not increased over than LBA detection band [
LBA.B
]
during LBA monitoring time [
LBA.T
], or when control output MV is 0%(100% for
cooling control) and PV is not decreased below than LBA detection band
[
LBA.B
] during LBA monitoring time [
LBA.T
], alarm output turns ON.
Start
to
①
When control output MV is 100%, PV is increased over than LBA
detection band [
LBA.B
] during LBA monitoring time [
LBA.T
].
①
to
②
The status of changing control output MV (LBA monitoring time is
reset.)
②
to
③
When control output MV is 0% and PV is not decreased below
than LBA detection band [
LBA.B
] during LBA monitoring time
[
LBA.T
], loop break alarm (LBA) turns ON after LBA monitoring
time.
③
to
④
Control output MV is 0% and loop break alarm (LBA) turns and
maintains ON.
④
to
⑥
The status of changing control output MV (LBA monitoring time is
reset.)
⑥
to
⑦
When control output MV is 100% and PV is not increased over
than LBA detection band [
LBA.B
] during LBA monitoring time
[
LBA.T
], loop break alarm (LBA) turns ON after LBA monitoring
time.
⑦
to
⑧
When control output MV is 100% and PV is increased over than
LBA detection band [
LBA.B
] during LBA monitoring time [
LBA.T
],
loop break alarm (LBA) turns OFF after LBA monitoring time.
⑧
to
⑨
The status of changing control output MV (LBA monitoring time is
reset.)
When in standard control mode, a loop error will be assumed and the
alarm output is turned on if the control deviation |SV-PV| is beyond the
LBA Detection Set (
LBA.S
: LBA Set Level) and does not decrease below
the LBA detection band (
LBA.B
: LBA Band) within the LBA monitoring
time (
LBA.T
: LBA Time).
Control Start
①
After control starts, the LBA output turns off as control deviation |SV-
PV| is reduced below the LBA detection band within the LBA
detection time.
②
Control deviation |SV-PV| is within LBA Detection Set. LBA is not in
operation.
③
Control deviation |SV-PV| does not decrease below the LBA
detection band within the LBA monitoring time when PV is out of
LBA detection range. LBA output therefore turns on.
④
Control deviation |SV-PV| decreases below the LBA detection band
within the LBA monitoring time when PV is out of LBA detection
range. LBA output therefore turns off.
⑤
Control deviation |SV-PV| does not decrease below the LBA
detection band within the LBA monitoring time when PV is out of
LBA detection band. LBA output therefore turns on.