Yamato Scientific BH300 Thermo-Elite - Manual (Page 28)

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Drive continuance after power supply returns
(in case of auto return)
The operation of the controller to whom the automatic return mode is set is as follows when blacking
out while driving.
1. Power failure in program drive
When measured temperature after power restoration is out of the waiting band based on target
temperature just before power failure, operation will enter the waiting status regardless of the wait
setting of a segment currently executed. The timer that controls progress of operation will stop and
operation will enter the waiting status even if the waiting function has been set to OFF in this segment.
(This is called forced wait) When the remainder time is selected with the display change key at the forced
wait, it is displayed in a sub-display as FW. The power failure period is not added as drive time. The
remainder time immediately after the remainder time immediately before generation of the power
failure and the return of the power supply is a par.
2. Power failure in auto stop drive
Only when the operation stop time is set to duration, not clock time, the compulsory waiting mode will be
activated. When the remainder time is selected with the display change key at the forced wait, it is
displayed in a sub-display as FW. The time under the power failure is not added as drive time. The
remainder time immediately after the remainder time immediately before generation of the power
failure and the return of the power supply is a par. However, when the drive end time is set at clock time,
the power failure period is counted partially at the drive time. The remainder time immediately after the
return of the power supply is a value by which the power failure period was subtracted at the remainder
time immediately before the power failure. The drive begins immediately after the return of the power
supply when becoming drive beginning time for the power failure period.
3. Power failure because of state of drive beginning waiting (auto start mode etc.)
When the operation start time is set to duration, not clock time, duration of power failure will not be
counted as waiting time. The remainder time immediately after the remainder time immediately before
generation of the power failure and the return of the power supply is a par. However, when the drive end
time is set at clock time, the power failure period is counted partially at waiting time. The remainder
time immediately after the return of the power supply is a value by which the power failure period was
subtracted at the remainder time immediately before the power failure. The drive begins immediately
after the return of the power supply when becoming drive beginning time for the power failure period.
4. Power failure during operation with fixed set point or during soak operation (auto
start mode).
After the power supply returns when the power failure occurs while executing these drives which do not
depend at time, this machine restarts the drive aiming at the temperature set before blacking out.
5. Notes
The BH series of a standard specification automatically restarts the drive when fed power again after
blacking out.