Autonics TC4H, Manual

Page: 11 / 14

H-64
TC Series
Loop break alarm (LBA)
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 [
LBaB
] during
LBA monitoring time [
LBaT
], or when control output MV is 0% (100% for cooling control) and PV is not decreased below
than LBA detection band [
LBaB
] during LBA monitoring time [
LBaT
], alarm output turns ON.
Start control to ①
When control output MV is 0% and PV is not decreased below than LBA detection band [
LBaB
] during LBA monitoring
time [
LBaT
]
①to②
The status of changing control output MV (LBA monitoring time is reset.)
②to③
When control output MV is 0% and PV is not decreased below than LBA detection band [
LBaB
] during LBA monitoring
time [
LBaT
], loop break alarm (LBA) turns ON after LBA monitoring time.
③to④ Control output MV is 0% and loop break alarm (LBA) turns and maintains ON.
④to⑥ The status of changing control output MV (LBA monitoring time is reset.)
⑥to⑦
When control output MV is 100% and PV is not increased over than LBA detection band [
LBaB
] during LBA monitoring
time [
LBaT
], loop break alarm (LBA) turns ON after LBA monitoring time.
⑦to⑧
When control output MV is 100% and PV is increased over than LBA detection band [
LBaB
] during LBA monitoring
time [
LBaT
] loop break alarm (LBA) turns OFF after LBA monitoring time.
⑧to⑨ The status of changing control output MV (LBA monitoring time is reset.)
※
When executing auto-tuning, LBA detection band [
LBaB
] and LBA monitoring time are automatically set based on auto
tuning value. When AL1, AL2 alarm operation [
AL-1
,
AL-2
] is set as loop break alarm (LBA) [
LBa
], LBA detection
band [
LBaB
] and LBA monitoring time [
LBaT
] parameter is displayed.
Temperature
SV
LBA
monitoring time
PV
LBA detection
band
LBA detection
band
LBA detection
band
LBA detection
band
LBA
invalid
LBA
invalid
LBA
invalid
LBA
monitoring time
LBA
monitoring time
LBA
monitoring time
LBA
monitoring time
Control
output
MV
100%
Time
① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨
0%
Loop break
alarm (LBA)
※
When selecting cycle or phase control mode, the power supply for load and temperature controller must be the same.
※
In case of selecting cycle [
CYCL
] or phase [
PHAS
] control mode for PID control, control cycle [
T
] is not allowed to set.
※
For AC/DC power model (TC4 - 2R), this parameter [
SSrM
] is not displayed and it is available only standard control
by relay or SSR.
SSR drive output function (SSRP function) [
SSrM
]
SSR drive output
(12VDC)
Load
Power
100-240VAC
50/60Hz
Temperature controller
(TC4 Series)
SSR Module
INPUT LOAD
● SSRP function is selectable one of standard ON/OFF control, cycle control, phase control by utilizing standard SSR drive
output.
● Realizing high accuracy and cost effective temperature control as linear output(cycle control and phase control).
● Select one of standard ON/OFF control [
STND
], cycle control [
CYCL
] , phase control [
PHAS
] at [
SSrM
] parameter of
Parameter group 2. For cycle control, connect zero cross turn-on SSR or random turn-on SSR. For phase control,
connect random turn-on SSR.