Current output range[oMA] : In case of selectable current output or SSR drive output model(TX4S- 4C), when control output [OUT]
parameter 2 group is set as [CURR], you can select high/low-limit range, 4-20mA [4-20] or 0-20mA [0-20] of current output.
Hysteresis[HYS] : Set interval between ON and OFF of control output for ON/OFF control.
If hysteresis is too narrow, hunting(oscillation, chattering) could occur due to external noise.
In case of ON / OFF control mode, even if PV reaches stable status, there still occurs hunting. It could be due to hysteresis
[HYS] setting value, load’s response characteristics or sensor’s location. In order to reduce hunting to a minimum, it is required
to take into following factors consideration when designing temp. controlling; proper Hysteresis [HYS], heater’s capacity,
thermal characteristics, sensor’s response and location.
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 100%, PV is increased over than LBA detection band [LBaB] during LBA monitoring
time [LBaT].
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 [LBaB] during LBA monitoring time
[LBaT], loop break alarm (LBA) turns ON after LBA monitoring time.
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